Mariska Hargitay and Christopher Meloni Reunite on Set in N.Y.C., Plus Michelle Williams, Hilary Duff and More

Mariska Hargitay and Christopher Meloni reunite on the set of Law and Order: SVU on Monday in N.Y.C.

Michelle Williams steps out in a tan winter coat and white trousers as she chats on the phone while walking through N.Y.C. on Sunday.

Hilary Duff is seen filming a scene from Younger on Monday in midtown Manhattan.

Liev Schreiber and Matilda De Angelis film on the set of Across the River and into the Trees on Sunday in Venice Italy.

Demi Moore and daughter Scout Willis leave their hotel in Paris on Tuesday during Haute Couture Paris Fashion Week.

Gavin Rossdale heads to the park with his dog Chewy on Sunday in L.A.

Lucy Hale grabs her lunch to go at Dialog on Monday in West Hollywood.

Euphoria star Hunter Schafer steps out in all black and a neon green mask on Monday in N.Y.C.

Chris Pratt smiles wide on Monday during a game of golf in Sydney, Australia.

Norman Reedus and Diane Kruger fly under the radar during a walk through N.Y.C. on Sunday.

Jennifer Lopez shows off her toned arms following a weekend workout in Miami.

Kaia Gerber goes casual on Sunday while out in West Hollywood.

Katie Holmes and Emilio Vitolo Jr. walk arm-in-arm through N.Y.C. on Sunday.

Million Dollar Listing's Fredrik Eklund talks on his phone during a stroll in Miami over the weekend.

Jennifer Garner was spotted picking up coffee with a friend and wearing a bright yellow rain jacket in Brentwood, California.

Sarah Jessica Parker helped shoppers at the SJP by Sarah Jessica Parker store in New York City.

Hugh Jackman was seen wearing a face mask and walking his dogs in New York City.

Pregnant Katharine McPhee was seen shopping with her mother in Beverly Hills, California.

Arnold Schwarzenegger was spotted enjoying a bike ride in Los Angeles.

Keanu Reeves was spotted going for a ride on his motorcycle in Los Angeles.

Cardi B wore an eye-catching outfit by Pierre-Louis Auvray in Beverly Hills, California, during a shopping outing with husband Offset.

Heidi Klum posed at the About You Fashion Week in Berlin.

Susan Sarandon and Jessica Lange were spotted walking together in New York.

Bob Odenkirk and his wife Naomi were spotted taking their two dogs out for a walk in Los Angeles.

Naomi Watts and her pup make an adorable pair in New York City on Friday.

Alessandra Ambrósio continues her visit to Brazil on Friday with a trip to the beach in Florianópolis.

Expectant Hilary Duff heads to the New York City set of Younger on Friday.

Michael B. Jordan and Lori Harvey depart St. Bart's on Thursday after wrapping up their tropical vacation.

Jodie Turner-Smith looks ready for warmer days on Thursday while out in New York City.

Forest Whitaker gets into character on Thursday on the New York City set of Godfather of Harlem.

Maggie Gyllenhaal stays toasty under her warm layers (and with a hot drink) on Thursday in N.Y.C.

Camila Cabello takes a call during a solo walk in Miami on Thursday.

Scout Willis fills her cart during a Thursday trip to Home Depot in L.A. on Thursday.

Selma Blair looks ready to ride while out grabbing coffee in L.A. on Thursday.

Rihanna shows off her supercool street style while en route to dinner with boyfriend A$AP Rocky and friends (not pictured) in New York City on Wednesday night.

John Legend, Chrissy Teigen and her mom Vilailuck stop for some Biden/Harris merch on Wednesday while in Washington, D.C., for the inauguration of President Joe Biden.

Hilary Duff is all dressed up, hiding her baby bump with a large clutch on the set of Younger in New York City on Wednesday.

Elsa Pataky flies solo on Wednesday in Sydney, Australia.

Justin Theroux and dog Kuma keep it moving on Wednesday in N.Y.C.

Sarah Hyland and Wells Adams hold hands on a Tuesday walk through West Hollywood.

Ryan Reynolds hits the Vancouver, Canada, set of his new film, The Adam Project, on Tuesday.

Ahead of her inauguration performance, Jennifer Lopez visits the United States Capitol building in Washington, D.C., on Tuesday.

Joey Fatone celebrates National Popcorn Day on Tuesday at Sugar Factory Orlando with a tasty treat featuring Candy Pop and Cookie Pop popcorn made with Oreo cookie pieces.

Lily Collins arrives at a friend's house to say a quick hello in Los Angeles on Tuesday.

Liev Schreiber waves while filming scenes for Across the River and into the Trees in Venice, Italy, on Wednesday.

A bundled Rosalía grabs a green juice on Tuesday in New York City.

Logan Browning and her pooch make a masked visit to a dog park in Los Angeles on Tuesday.

Rooney Mara carries a large canvas bag while out on a shopping trip on Tuesday in L.A.

Arnold Schwarzenegger goes for a bike ride through Will Rogers beach on Tuesday in Santa Monica.

Julianne Hough shows off her flexibility after leaving the gym in L.A. on Monday.

Michael B. Jordan sizzles in a tank top and gold accessories during his photoshoot for Men's Health on Monday in St. Bart's.

Ryan Reynolds is seen filming a scene for his Netflix movie, The Adam Project, on Monday in Vancouver.

Supermodel Heidi Klum shoots a new episode of Germany's Next Topmodel season 16 at the Mall of Berlin.

New mom Katy Perry dons her "mama" cap to run a few errands in Santa Barbara on Sunday, before heading home to Montecito, California.

Hilary Duff and her growing baby bump make an appearance on Monday in N.Y.C.

Model Jasmine Sanders makes waves on Monday while on the beach in Miami.

Matilda de Angelis and Liev Schreiber are on to something on Monday on the Venice, Italy, set of Across the River and Into the Trees.

Eiza Gonzalez springs into action as she responds to a car crash on the set of Ambulance in Los Angeles on Monday.

Lucy Hale wears a message on her chest as she steps out in Los Angeles on Monday.

Selena Gomez makes the sidewalk her catwalk in New York City on Sunday.

A cozy-looking Kelly Rowland dons her mask and her sunglasses for a visit to the doctor in L.A. on Thursday.

Selma Blair is deep in thought on Saturday while out for coffee in West Hollywood.

Dakota Johnson hits the brakes on Saturday while out for a drive in Malibu.

Lily Allen totes some goodies while listening to tunes in London on Monday morning.

Paul Mescal joins the Carmen cast on set in Sydney, Australia, on Sunday.

Rooney Mara was seen going for a hike and wearing a face mask in Los Angeles.

Jennifer Lopez was spotted leaving the gym after a workout in Miami, Florida.

Martin Short was spotted filming the upcoming Hulu series Only Murders in the Building in New York City.

Michael K. Williams enjoyed an outing at The Men's Room pop-up shop in New York City.

Naomi Watts was seen FaceTiming during a walk with her dog in New York City.

Katie Holmes looked stylish as she kept warm during an evening stroll in New York City.

Minka Kelly was out and about in Beverly Hills, California, wearing an olive jumpsuit.

Olivia Rodrigo smiled with her No. 1 award from the Official Charts Company for her hit "Drivers License."

Joshua Jackson and Jodie Turner-Smith were spotted bundling up for an outing in New York City.

Judoka Teddy Riner was all smiles meeting Jason Statham in Doha, Qatar.

Zayn Malik's biggest fan — also known as love Gigi Hadid, mom to their three-month-old daughter — gives a big thumbs up by the N.Y.C. promo truck for his new single "Nobody's Listening."

Lily Collins gets some retail therapy in at the L.A. Hermès store.

Lucy Hale's leopard phone case jazzes up her all-business workout attire on the way to the gym in L.A.

Helena Christensen dons a cuddly pink topper to run errands in N.Y.C.

Kate Hudson takes a walk in Pacific Palisades, California with her dog on Thursday.

50 Cent (center) hosts a party for Barry Mullineaux (left) on Thursday in Miami, Florida.

Leighton Meester dives into a surf session in Malibu, California on Thursday with her husband, Adam Brody.

Olivia Palermo masks up for a stroll in Brooklyn on Thursday.

Gavin Rossdale gives it his all on Thursday during a game of tennis in Los Angeles.

Another day, another outing for mom-to-be Emily Ratajkowski, who totes a bag through N.Y.C. on Thursday.

A masked Lucy Hale goes for a hike in Los Angeles on Thursday.

Gigi Hadid steps out with her mom Yolanda for a coffee run on Wednesday in N.Y.C.

Jennifer Garner chats on the phone as she’s seen running errands on Wednesday in L.A.

Matt Damon is spotted in an all-black look while enjoying an afternoon stroll in L.A. on Wednesday.

Emily Ratajkowski shows off her growing baby bump in a white turtleneck and jeans on Wednesday in N.Y.C.

Rebel Wilson stocks up on groceries with a reusable tote bag on Thursday in L.A.

Bradley Cooper wears a sweatshirt and joggers after a workout session at a private gym in Santa Monica on Wednesday.

Guest star Al Roker checks up on Bobbly Flay as he competes during the Signature Dish challenge on Beat Bobby Flay.

Zachary Quinto keeps it casual as he stocks up on food and drinks at Gelson's supermarket on Wednesday in L.A.

Odiseas Georgiadis, star of Netflix's Trinkets, is seen during a photoshoot in N.Y.C.'s Soho neighborhood.

Chrissy Teigen wears a brown sweater and matching boots while out grocery shopping at Bristol Farms in Beverly Hills on Tuesday.

Sarah Jessica Parker puts on layers to beat the N.Y.C. cold on Tuesday, as she leaves her SJP by Sarah Jessica Parker shoe store.

Parents-to-be Henry Golding and Liv Lo go for a walk before grabbing a bite to eat out in L.A. on Monday.

Jennifer Lopez dresses comfortably in a blue-and-white outfit after leaving her Miami gym to eat lunch at Havana Harry's on Tuesday.

Morgan Wallen performs at the Ryman Auditorium on Tuesday in Nashville.

Justin Bieber spends the day in Hawaii, snorkeling and walking the beach on Sunday.

Busy Philipps wears a beanie, a long puffer coat and animal-print pants on Monday in N.Y.C.

Alessandra Ambrosio hits the water to exercise at the beach in Brazil on Tuesday.

Padma Lakshmi looks red carpet ready at the 30th annual IFP Gotham Awards, sponsored by Robert Hall Winery, in N.Y.C. on Monday.