United Kingdom, Nov. 7 -- George Clooney has praised Bea Arthur for making him laugh "harder than anybody".

The 64-year-old actor guest starred on The Golden Girls as a detective named Bobby Hopkins back in 1987 and he's singled out the late actress - who died aged 89 in 2009 - for particular praise during his stint on the beloved sitcom.

In a trailer for The Golden Girls: 40 Years of Laughter and Friendship - Special Edition of 20/20, shared exclusively with People magazine, George opens it by exclaiming: "The Golden Girls!"

Sheryl Lee Ralph then asked: "Who wasn't a fan of The Golden Girls?"

As archive footage of stars Betty White, Rue McClanahan and Bea as Rose Nylund, Blanche Devereaux and Dorothy Zobrnak respectively then appeare...