Selena Gomez and Niall Horan kissed at Jenna Dewan-Tatum's birthday bash Credit: Gabriel Olsen/Getty Images

New couple alert! Selena Gomez and Niall Horan were spotted kissing at Jenna Dewan Tatum’s 35th blowout birthday bash at Bootsy Bellows in L.A. on Friday, Dec. 4.

“Niall and Selena were seen kissing in the middle of the club, in front of everyone,” an eyewitness confirms to Us Weekly.

Another source adds that the “Good for You” singer, 23, and the One Direction member, 22, spent the entire evening by each other’s side.

“Niall and Selena definitely seemed very close and like they were together,” the insider says. “Niall got there first with his bodyguard, then the next thing I know, I looked over and Selena was there. They were very close together, talking and whispering.”

As for later on in the evening?

“Selena and Niall left together,” the insider reveals. “She grabbed his arm on the way out and held onto it.”

Horan later took to Twitter to share a snap with the former Disney star, along with other friends. “LA squad,” he tweeted on Saturday, Dec. 5, sharing a photo taken at Dewan Tatum’s birthday bash featuring him with his hand on Gomez’s shoulder.

The two stars were first photographed together on Monday, Nov. 23, having a group dinner with pals, prompting fans to wonder whether they had begun dating.

The star-studded bash — a joint birthday party for Jenna Dewan Tatum and her best friend, actress Emmanuelle Chriqui, 37 — was thrown by their husbands, Channing Tatum and Adrian Bellani. Adam Levine and Behati Prinsloo, Ashton Kutcher and Mila Kunis, Jamie-Lynn Sigler, Jessica Alba and Cash Warren, Kevin Connolly, Jerry Ferrara, Mina Tobias, and Lea Michele also were in attendance.

“Everyone was dancing all night,” the second insider adds. “Nothing else crazy happened, it was just a great time with lots of dancing and catching up.”

Numerous A-listers shared fun snaps from the bash on their social media accounts.

“Girls night out with our boys,” Scream Queens actress Michele, 29, captioned an Instagram snap. “Celebrating the beautiful @jennaldewan. Happy birthday Jenna!”

Girls night out with our boys ❤️ Celebrating the beautiful @jennaldewan 🍾🍾🍾 Happy Birthday Jenna!

A photo posted by Lea Michele (@msleamichele) on

Prinsloo, 26, also shared a fun pic of the night with hubby Levine, 36, and other friends. “SICK,” the model wrote.

SICK ✌🏼️

A photo posted by Behati Prinsloo Levine (@behatiprinsloo) on

Tobias took to her Instagram account to share a snap of herself with the Magic Mike hunk, 35, and Dewan-Tatum. “Silly rabbit, props are for kids,” she captioned the goofy pic. “#HAPPYBIRTHDAYJENNA.”

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