'Late Show': Joan Rivers Jokes About Goldie Hawn's Plastic Surgery And Betty White Sleeping Her Way To The Top (VIDEO)

Age shall not weary or mellow Joan Rivers. She and "Late Show" (Weeknights, 11:35 p.m. EST on CBS) host David Letterman were discussing the weighty topic of ageism in Hollywood when she took the opportunity to spill some juicy gossip about a couple of industry veterans.

Joking about a subject dear to her heart -- plastic surgery -- Joan said Goldie Hawn has had way too much work done. Allegedly. "She's been pulled so tight, they say, that when she swallows she has an orgasm," Rivers cracked.

Moving on to the topic of sex, Rivers and Letterman agreed that it plays a big part in showbusiness, and Rivers revealed that the casting couch is still an option, even for the more mature ladies.

"Betty White! We know how she came back," joked Rivers. "Suddenly she's back? Come on. Ask backstage! ... She is known in the business as 'Bendover Betty'!"

As he mulled over the gossip, all Letterman could say was "Wow."

"Late Show With David Letterman" airs Weeknights at 11:35 p.m. EST on CBS.

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