• Jeffrey Dean Morgan shared a throwback picture of him and late co-star Bill Paxton on Twitter
  • Another co-star, Amanda Seyfried, also posted a moving tribute for Paxton on Instagram
  • The actor died in 2017 after suffering a stroke days after surgery

Jeffrey Dean Morgan and Amanda Seyfried honored their late co-star Bill Paxton in emotional social media tributes over the weekend, more than four years after the actor's death.

The "Walking Dead" star took to Twitter Saturday to share a throwback photo with Paxton in which the two actors are smiling side-by-side under umbrellas. Both are in full costume, wearing a pair of suspenders and high boots. However, Morgan is wearing his hat while Paxton's is perched on his knee

"This popped up today on my phone memories. Goddamn, I Miss him. So much. Never known anyone quite like Bill. Never will. Loved him with a passion. Everyone lucky enough to know him did," Morgan, 55, wrote in the caption.

The snap appeared to have been taken on the set of the "Texas Rising" miniseries, which first premiered in 2015 on the History Channel, People noted. Paxton starred as General Sam Houston, while Morgan played Captain Deaf Smith in the historical drama.

Other Twitter users also remembered Paxton, with actor William Sadler saying he knew the late star from his 1992 movie "Trespass," adding, "Gone way too soon." Morgan replied with a red heart emoji.

"When friends and family are gone too soon, it feels like there is something missing! We all feel that missing sensation every day when someone good comes along in our lives and makes it that much brighter! Miss you Bill Paxton!" another user commented on Morgan's post.

On Friday, Seyfried, 35, also posted a moving tribute for Paxton on Instagram alongside a throwback photo of them together.

"Bill and me. Sorting through the thousands of photos I’ve packed away over the years has been mostly fun but every once in a while I find one that brings me to my knees," she wrote. "I got so lucky to know this man and feel his bright, warm light so often while playing his daughter on 'Big Love.' He was wonderful and so deeply loved and I miss him."

They worked together on "Big Love," in which Seyfried played Paxton's character's daughter in the polygamist HBO drama series that also stars Ginnifer Goodwin, Jamie Lee Curtis, Chloe Sevigny and Jeanne Tripplehorn, among others. The show debuted in 2006 and aired its finale in 2011.

When Paxton passed away in 2017 at age 61, Seyfried grieved along with their other co-stars.

"He was an amazing and supportive father-figure to me in my early career," she told People at the time. "Incredibly inspired and full of life at every turn, he made you feel like everything was possible. This is a terrible loss."

Paxton suffered a stroke in February 2017, less than two weeks after he underwent heart surgery to repair an aortic aneurysm and replace his bicuspid aortic valve. He died from complications from surgery, and his family filed a wrongful death lawsuit against his surgeon and Cedars-Sinai Medical Center, USA Today reported.

Jeffrey Dean Morgan
Actor Jeffrey Dean Morgan arrives at the premiere of "Clash of the Titans" at the Grauman's Chinese theatre in Hollywood, California March 31, 2010. The movie opens in the U.S. on April 2. Reuters/Mario Anzuoni