It’s a celeb smooch switcheroo!

Will Arnett’s ex girlfriend, Alessandra Brawn, is dating Emily Ratajkowski’s ex-husband Sebastian Bear-McClard, sources tell Page Six.

Ratajkowski and Bear-McClard split in 2022, and the “Arrested Development” actor and Brawn broke up quietly late last year.

Now a spy tells us Brawn and Bear-McClard, who have known each other since childhood, have got together instead.

Brawn and Arnett share a 5-year-old son, Alexander “Denny” Denison.

Brawn also has another child with her ex-husband, nightlife impresario Jon Neidich, whom she married in a luxe ceremony in Tuscany that was covered by Vogue.

McClard and Ratajkowski have a four-year-old son, Sylvester Apollo Bear.

“The co-parents all have a good relationship,” says a source.

Brawn — who has worked in public relations and owned a vintage clothing company — and Arnett dated for five years and quietly split in late 2024.

Last week, news broke that the “Arrested Development” star and “Smartless” podcaster is dating model Carolyn Murphy.

The couple saw Sean Hayes’ play, “Good Night, Oscar,” on London’s West End in August.

Ratajkowski filed for divorce from Bear McClard amid claims of infidelity. The split was finalized in July 2025.

The pair had been married in a courthouse ceremony in February 2018 after going public with their romance only two weeks prior.

Ratajkowski was most recently seen looking flirty with “Elvis” star Austin Butler last week at the Waverly Inn.

“They were in a big half booth in the center of the restaurant for everyone to see,” an insider told Page Six. “His arm was kind of around her and he kept nodding at what she said.”