Actor Jason Alexander has paid tribute to his Seinfeld co-star Len Lesser, praising him as "a tremendous guy".
Lesser, who played Seinfeld's Uncle Leo in the sitcom, passed away from cancer-related pneumonia in California on Wednesday, at the age of 88.
Alexander spent a lot of time with Lesser as he portrayed Seinfeld's best friend George in the series, and has taken to his Twitter.com page to pay a touching tribute to the veteran actor.
He writes: "Len was a tremendous guy. He was a smart actor/comedian who knew exactly what he was doing in the creation of Uncle Leo.
"I enjoyed many wonderful conversations with Len who was so openly grateful to be part of our show and so humble about his stunning contribution to it. I am so happy to have known him and my sympathies go to his family. But his was a fun life and he leaves many fans behind and many who will be enjoying his work for years to come.
"Hellooo Uncle Leo. And goodbye. Sleep well. Much love."