Jane Fonda is kissing and telling!

During an appearance on The Ellen DeGeneres Show on Thursday, May 14, the 77-year-old actress gushed about locking lips with her Grace and Frankie costar Craig T. Nelson — her first onscreen kiss in 15 years!

"It was a lot of fun… No tongue! We wanted it to be spontaneous," Jane said of the smooch, which took place during the new Netflix series' seventh episode.

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Jane with Craig on Grace and Frankie.

"I left the business for 15 years… and if somebody had told me then that at 77 I would be back at a thing called Netflix… and that I would have my first kiss at 77 since 15 years I would say you’re crazy," she continued.

RELATED: Jane Fonda Wows in 'Barbarella' Inspired Outfit Nearly 50 Years After the Cult Film Premiered

Grace and Frankie — which premiered on May 8 — is a 13-episode series starring Jane and her former 9 to 5 costar and friend, Lily Tomlin, 75. The comedy follows two women, Grace (Jane) and Frankie (Lily), who are brought together after their husbands — played by Sam Waterston and Martin Sheen — announce they are in love with each other and plan to marry.

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Jane with Lily on Grace and Frankie.

"Ever since I got old, I've wanted to give a cultural face to older women, and television is the place to do it," Jane previously said of the show during an AOL BUILD interview before its premiere. "[Lily and I] had a lot of fun."

During her appearance on Ellen, the Oscar-winning actress also played a fun game of "Never Have I Ever" with host Ellen DeGeneres where she confessed she joined the mile high club at age 50 during a flight with her now ex-husband, Ted Turner!

Watch Ellen and Jane play "Never Have I Ever" in the clip below.