Jennifer Lopez posts lip-locked photo with Ben Affleck after relationship rumors

Bennifer 2.0 appears to be a go! 

Jennifer Lopez made her relationship with Ben Affleck Instagram official with a birthday surprise. After rumors milled and paparazzi photos surfaced for months of the two reuniting after her breakup with ex-fiancé Alex Rodriguez, Lopez finally sealed her relationship status with a kiss. 

The singer posted a series of photos dressed in a pink and orange stringed bikini, a colorful floral beach coverup and a straw hat on Instagram Saturday to celebrate her 52nd birthday. On the last slide she wore her new-but-old lover Affleck, locked by the lips. 

"5 2 … what it do …..," she wrote on the relationship reveal. 

The photo marks the first time either Lopez or Affleck have posted anything about their renewed love. 

Lopez and Affleck first took pop culture by storm after they started dating in the early 2000s. The Hollywood power couple – who starred together in 2003's "Gigli" and 2004's "Jersey Girl" – got engaged in November 2002 (remember her pink engagement ring?). But at the time there wasn't a happily ever after – Lopez and Affleck ended their engagement in 2004.

More:Jennifer Lopez says she's 'never been better' amid Ben Affleck romance rumors

Leading up to Saturday's birthday kiss the two made an Instagram debut on behalf of Leah Remini who posted a two-minute video montage Thursday which featured Lopez and Affleck cuddled together in a black-and-white snap.

Over the July 4th holiday weekend, Lopez and Affleck were seen enjoying a day out at Universal Studios Hollywood in California with their kids, according to photos and reports from Page Six and Entertainment Weekly. 

More:Jennifer Lopez, Ben Affleck and the pressure to make things 'Instagram official'

Celebrity watchers took to social media to celebrate the early aughts couple's return. 

"jlo doing a boyfriend reveal on her birthday at the end of a photo dump of solo bikini pics ...... it's giving leo season," @hunteryharris wrote on Twitter. 

@WrittenByHanna wrote: "Relationship JLO might just take actress JLO’s spot in the JLO hierarchy."

"It's JLO's birthday but she gave US a gift. Selfless queen," @shylawhittney wrote. 

"You look super happy," "Today" show host Hoda Kotb wrote under the Instagram photo. 

Lopez announced her breakup with Rodriguez on the "Today" show in April with a joint statement. 

"We are better as friends and look forward to remaining so," the statement read. "We will continue to work together and support each other on our shared businesses and projects."

Contributing: Hannah Yasharoff, Cydney Henderson