The quintessential best friend and co-worker, Greer's Penny Nicholson, attempted to keep Mary on the straight and narrow despite her feelings for Eddie.
After her appearance in The Wedding Planner, Greer went on to play the BFF in movies like 13 Going on 30 (2004), 27 Dresses (2008), Love & Other Drugs (2010), The Descendants (2011), Ant-Man (2015), Jurassic World (2015), War for the Planet of the Apes (2017) and Halloween Kills (2021).
The actress has also been featured on countless series, including Miss Guided, Mad Love, Married, Casual, Arrested Development, Kidding and Reboot. She's lent her voice to characters on shows like Archer and Let's Go Luna! as well.
Greer has been married to producer Dean E. Johnsen since 2011 and is a stepmom to his two children.