Vivian Zink/Walt Disney Television via Getty T.R. Knight as George O'Malley
Will George O'Malley be making another guest appearance on Grey's Anatomy?
On Dec. 3, fans started speculating and asking questions about T.R. Knight's possible return to the ABC medical drama after current star James Pickens Jr. posted a photo of himself with Knight, current costar Chandra Wilson and recurring guest star Kate Walsh on the set of Grey's.
"Here's another BTS from last month with the crew, have a great weekend!" Pickens Jr., 67, captioned his photo.
While Wilson and Pickens Jr. were in full scrub attire, Walsh — who first joined the long-running medical drama in the season 1 finale as Derek Shepherd (Patrick Dempsey)'s estranged wife, Dr. Addison Montgomery and returned this season for two episodes — and Knight didn't appear to be in costume.
One fan wrote, "Omg, George O'Malley is coming back??," while another wrote, "Who's seeing George in heaven now?"
Despite the hype, PEOPLE has learned that Knight was solely on set visiting costars and shadowing a few people behind the scenes to learn some new skills.
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ABC T.R. Knight
Knight's character, George O'Malley, was the first of the five original interns to leave the show in 2009. George died in the season 5 finale after sacrificing himself to save a woman from being hit by a bus.
After his appearance in 2020, Knight expressed his love for his fan-favorite character and the Grey's cast on Instagram.
"George O'Malley will always claim my heart," Knight wrote. "Thank you to Ellen, Chandra, Jim, Krista, and all the familiar faces for once again sharing your beautiful light."
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Later, he added a tribute to Pompeo and how much he loves the actress, 51, both as a scene partner and a friend.
"Ellen is the kind of actor I'm endlessly grateful to act with," Knight wrote. "She's the embodiment of truth. George and Meredith love each other, for sure, but I don't think he can hold a candle to love I have for Ellen."