The couple - who previously dated between 2002 and 2003 after meeting on the set of rom-com Gigli - have been pictured getting cosy in Big Sky, Montana and California in recent weeks.
And while they haven't confirmed anything officially, paparazzi pictures corroborate all the rumours, as the pair have been seen locking lips while out for a family meal in the last few days.
Naturally, this has sent fans into a frenzy, and they've been harking about Bennifer 2.0 ever since.
And in all the excitement, fans have been reflecting on the couple's old romance - in particular the album she dedicated to him back in 2002.
Yes, that's right, JLo put out an album the same month she got engaged to Ben, and it's rumoured to be in honour of him.
Taking to Instagram earlier this week, JLo, 51, told fans that This Is Me... Then was her favourite album, in a not so coincidental nod to her romance with the Oscar winner, 48.
Naturally, since then, fans have been listening back with glee - in particular to one song, entitled Dear Ben.
Dear Ben is actually about the actor (in case the name didn't give it away), and the lyrics show just how in love with him she really was.
They go: "You're perfect/ I just can't control myself/ I can't be with no one else/ Seems I'm addicted to the way you like to touch me/ I don't think they understand/ Why I love at your command".
Check out the music video below:
Later in the song she sings: "I love you, you're perfect/ A manifestation of my dreams/ You make my body feel/ About a million different things/ I think God made you for me".
We don't think anyone can deny there were some feels there, after listening to that.
As the news of the pair's relationship resurfaced, fans begun blasting the song on repeat.
"JLO CAN FINALLY SING "DEAR BEN" AGAIN OMG," someone wrote.
"You know what....I've been wanting to see JLo back w/ Ben Affleck . Have yall ever listened to "Dear Ben?". She needs this," another said.
"So JLo just posted on Instagram how "This is me...then" is her favorite album ever. Coincidentally it's an album dedicated to ...... Ben Affleck. (There is also a song called Dear Ben)," a third reminded fellow stans.
"Everyone's acting wild over JLo and Ben Affleck back together.. I remember Dear Ben...and how cute they were together ..dang, am I back in [high school]," someone else reminisced.
Ah, there's nothing like an A-list celebrity romance to get us in our feelings.
Back in the 2000s, Ben and Jen were the ultimate power couple, and they famously got engaged not long after they met on the set of Gigli, with the Batman star presenting JLo with a 6.1 carat pink diamond.
They postponed their nuptials just one day ahead of their big day in 2003, citing the media attention as their downfall, and in 2004 they confirmed their relationship is over.
Before their apparent rekindling, Ben was dating actress Ana de Armas while JLo was dating Alex Rodriguez (A-Rod).
Here's hoping this new romance means another album is on the cards?!
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