Rosie O'Donnell and Tatum O'Neal Are 'Romantically Involved': Source

In an unexpected summer romance, Tatum O’Neal and Rosie O’Donnell are dating, a source tells PEOPLE.

“They are romantically involved,” says the source. “It’s a bicoastal relationship.”

News of the under-the-radar relationship comes just months after O’Neal, 51, revealed exclusively to PEOPLE that she now dates women.

Mary-Kate Olsen & Olivier Sarkozy Look Enamored In Paris


Mary-Kate Olsen and boyfriend Olivier Sarkozy took their romance to the City of Love as the couple waited for their flight at the Paris Charles de Gaulle Airport on Sunday.

Leaning in toward each other, the couple stares into each others’ eyes as they appear to be deep in conversation – or going in for a kiss!

Couples Watch: Drew & Justin, Kimora & Djimon ...

• Drew Barrymore and Justin Long, dining for hours with friends at Dakota, a steakhouse inside the Hollywood Roosevelt Hotel. The party of 10 wanted a little more privacy and asked the manager to dim the lights, cheering when he obliged. “Justin and Drew were cozy,” an onlooker tells us about the twosome. The next day, Barrymore and Long were spotted at CityWalk Cinemas, where they caught Owen Wilson’s comedy, Drillbit Taylor.