Pamela Anderson greets ex-husband Tommy Lee with a kiss

They were one of the most famous Hollywood couples of the late '90s, and on Wednesday night, Pamela Anderson and Tommy Lee reunited.

The former spouses greeted each other with a hug and a kiss while at PETA's 35th Anniversary Party in Los Angeles, California. Anderson co-hosted the star-studded event at the Hollywood Palladium alongside actress Anjelica Huston, while Lee was among the honorees.

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An attendee at the event tells ET that Anderson was smiling during Lee's acceptance speech and there was a moment when the two were onstage together. The former couple were seated on opposite sides of the venue but ET's source says they "didn't seem awkward."

The 48-year-old former "Baywatch" star turned heads in her dark blue, sequin Vivienne Westwood gown, and her 52-year-old ex ditched his rocker duds for a sleek black suit. Both wished the organization a happy anniversary on their Instagram accounts, but Lee seemed more thrilled to see Paul McCartney perform than to be running into his ex-wife.

"Get it PAUL!!!" the Motley Crue rocker wrote, Instagramming three videos of McCartney's performance.

Lee's date for the evening was his fiancee Sofia Toufa.

Anderson and Lee were married from 1995 to 1998 and have two kids together, Brandon Thomas Lee, 19, and Dylan Jagger Lee, 17. The two said their "I dos" after only knowing each other for four days. Anderson wore a white bikini for the wedding held on a beach in Cancun, Mexico.

ET caught up with Anderson at the PETA party, and she said that when it comes to her oft naked campaigns, her sons don't pay attention to what she does.

"My kids don't read that stuff; they don't see it," she said while on the red carpet. "They're interested in their own lives, and they think that mom is just having a good time."

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Anderson added that her two boys are "proud of their mom, especially when it comes to animal rights and the things that I'm doing like tonight. They are very big supporters."