Alongside performances by Public Enemy and comedian Sarah Silverman, Van Dyke spoke in support of the Vermont senator on Sunday, two days before the crucial Super Tuesday primaries when 14 states vote.
Van Dyke delivered some introductions, broke into some dance moves and serenaded the crowd with a “Bye, Bye Birdie”-inspired tune about Sanders:
“We love you, Bernie. Yes we do. We love you Bernie, and we’ll be true. When you’re not near us, we’re blue. Oh Bernie, we love you.”
The 94-year-old legendary actor also joked about his age, saying: “I am what’s left of Dick Van Dyke.”
At one point, Van Dyke “lost his train of thought” on stage, but the crowd covered for him with chants of “We love Dick!” according to a Sanders supporter who was present.
Van Dyke formally endorsed Sanders last month, saying in a now-viral video that he’s a “very enthusiastic” supporter.
“I want to urge my generation to get out and vote for him, please,” Van Dyke says in the video message.
This article originally appeared on HuffPost.