The notoriously private duo have been the subject of romance rumors since 2013

Jamie Foxx rang in his birthday with a little help from Katie Holmes.

The two celebrated the actor’s 50th birthday with a night out in Los Angeles on Wednesday, a source tells PEOPLE. Foxx and Holmes — who have never confirmed their relationship — were seen arriving together at Paramount Pictures for his bash.

“They walked in together,” says the source. “They mostly mingled with other guests, and spent very little alone time. It was obvious that Jamie had a great birthday. Katie looked like she had fun as well. She looked gorgeous.”

Jamie Foxx and Katie Holmes on Thursday, December 14th, 2017.Credit: Splash
Jamie Foxx and Katie Holmes speaking together at his 50th birthday bash
| Credit: Splash

Beforehand, a few of Foxx’s closest friends celebrated his birthday at another event at the Highlight Room. The actor’s daughters Corinne Fox and Annalise Bishop were also in attendance. Holmes was not, but picked Foxx up from the party, according to the source.

A source told PEOPLE the actress “came to celebrate along with his management team” and various other stars in attendance such as Leonardo DiCaprio, Tobey Maguire, Kevin Connolly, Snoop Dogg, Wiz Khalifa, Odell Beckham Jr., Ludacris, Ice Cube and Doug E. Fresh.

Halfway through the night, Corinne and Anelise presented their dad with a custom birthday cake featuring a throwback picture of Foxx on the top and the words “Happy 25×2.”

Foxx also took to Instagram on his big day to thank his fans, friends and family for the birthday wishes.

Earlier this month, Holmes stepped out in New York City to support her rumored beau at the opening of the Privé Revaux store. The actress, 38, arrived separately to the event, where Foxx was one of the celebrities involved in the eyewear brand.

Credit: Gary Gershoff/WireImage; Mireya Acierto/Getty

The notoriously private duo have been the subject of romance rumors since 2013, and although they’ve never officially confirmed a relationship, multiple sources have told PEOPLE the low-key pair have been casually spending time together for years.

During Labor Day weekend in September, they were seen taking a romantic stroll on the beach in Malibu, California.