On Wednesday, the actor shared a photo of himself and the actress, who died in 2016 at the age of 60, on Twitter.
In the photo, Hamill can be seen leaning in to kiss Fisher as she smiles.
“Happy birthday Carrie Frances Fisher,” the 69-year-old wrote. “The world will never stop missing you…”
In 2018, before filming for Star Wars: Episode IX began, Hamill reflected on what it would be like returning to set without his co-star.
“It's bittersweet facing my final chapter without her - she is simply irreplaceable. I'm finding solace in the fact that she won't BE replaced & would love the worldwide outpouring of affection from those who loved her when they heard the news,” the actor wrote, adding the hashtag #CarrieOnForever.
Happy Birthday Carrie Frances Fisher.🎂
the world will never stop missing you..... 💔 pic.twitter.com/0KcQwePz5B
— Mark Hamill (@HamillHimself) October 21, 2020
The post also included photos of Hamill and Fisher, including one of them on the set of their final Star Wars movie together, as well as a photo of the film’s on-screen dedication to Fisher, which read: “In memory of our princess, Carrie Fisher.”
It's bittersweet facing my final chapter without her-She is simply irreplaceable. I'm finding solace in the fact that she won't BE replaced & would love the worldwide outpouring of affection from those who loved her when they heard the news.#CarrieOnForever pic.twitter.com/7ueMqBxQwa
— Mark Hamill (@HamillHimself) July 29, 2018
In addition to Hamill, hundreds of fans have also remembered Fisher on her birthday and shared what the actress meant to them.
“Happy birthday to Carrie Fisher. Our princess and general would’ve turned 64 years old today. To quote Luke, ‘No one’s ever really gone,’” one person tweeted.
Another said: “Happy 64th birthday to the brightest star in the sky, the one and only Carrie Fisher. Thank you for speaking out your mind and being an immense inspiration to so many people, for teaching us to be our own heroes and to not be afraid of who we are.”
words can’t express how much i miss her. happy birthday carrie fisher, i hope you are having a good one in you glittery palace among the clouds pic.twitter.com/6AuDqx5nfz
— spooky lucifer CARRIE DAY🎃 (@hanleiarey) October 21, 2020
Happy birthday to the legend that is Carrie Fisher, we miss you and love you queen 👑 pic.twitter.com/MXSIBvrCrb
— 🎒 (@kingbackpackii) October 21, 2020
The official Star Wars Twitter account also paid tribute to the late star, sharing a photo of her dressed as Princess Leia with the caption: “We’re remembering our courageous princess, the iconic Carrie Fisher on her birthday.”
We’re remembering our courageous princess, the iconic Carrie Fisher on her birthday. pic.twitter.com/aGmlZ66jO4
— Star Wars (@starwars) October 21, 2020
Fisher died in 2016 days after suffering a heart attack while flying from London to Los Angeles.