Amazing 1970s Video Shows Christoph Waltz Singing and Dancing in a Rainbow Unitard

— -- Christoph Waltz was forced to face his past Tuesday.

The “Horrible Bosses 2” actor, who grew up in Austria, has been acting since his late teens.

“It wasn’t [Quentin Tarantino]-type stuff, it was always heavy,” Waltz said on Tuesday’s episode of “Jimmy Kimmel Live.”

Kimmel provided film evidence from Waltz’s past – a 1970s children’s TV program called “Am Dam Des,” showing Waltz singing and dancing, depicting the new year in a form-fitting, rainbow-striped unitard. Waltz lowered his head and covered his eyes as the clip played.

Kimmel asked Waltz to explain the video, which pops up online from time to time.

“Had I known, I wouldn’t have made fun of Boy George,” he said.

Waltz later provided a dramatic interpretation of the “Sesame Street” theme song. Waltz said he “forced” his children to watch the show, a way for them to embrace American culture.

“I still watch it … It’s so entrenched, it’s raw, it’s full of despair, it’s poignant, deep,” he said.

“Are you sure we’re talking about the same show?” Kimmel asked.

“The theme song alone, it haunts me,” he said, before singing a tear-drenched version of the iconic song.