The 82-year-old actress recalled on the CBS late-night program how Stewart, her idol, surprised her by showing up to the finale of The Carol Burnett Show in 1978. Decades later, Colbert had a similar surprise up his sleeve.
The sweet, silly poem brought tears to Burnett's eyes. "The drinks are on me all night at the bar," Spacey, as Stewart, recited as Burnett became emotional, "because Carol Burnett is still comedy's greatest star."
Spacey had another great moment during his appearance on TheLate Show. He revealed to Colbert just who he imagines he's talking to when his House of Cards character, Frank Underwood, turns to the camera.
"Who is that person? Is it like a close confidant," Colbert asked. "Because, the person you're actually talking to, of course, are the people on a 10-hour Netflix binge sucking on box wine."