Chelsea Handler, Andre Balazs Take Relationship Public

Think Andre Balazs will end up in Chelsea Handler's next book?

The 36-year-old E! comedienne made her second public appearance with Balazs, her boyfriend of four months, while celebrating the launch of her fourth book, Lies That Chelsea Handler Told Me, at the Boom Boom Room in NYC on Saturday.

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Hotelier Balazs, who once dated Uma Thurman, wasn't the only one on hand to support Handler's latest writing efforts. Famous attendees included Lucy Liu, Katie Couric, Josh Hartnett, Vera Wang, Michelle Trachtenberg, Carla Gugino and Griffin Dunne, who all sipped on Belvedere Bloody Mary & Pink Grapefruit cocktails.

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What does Handler's gal pal Heather McDonald think of her relationship with Balazs, 54?

VIDEO: Chelsea leaks a nude picture of Heather

"He's a babe. He's very successful and he's very nice. I think she's met her match," the Chelsea Lately writer recently told E! News. "He doesn't put up with her, but in a fun way, which she loves. Chelsea likes when you don't put up with her too much."