AceShowbiz - Kendall Jenner and Ben Simmons are apparently back on. The exes ignited the rumors when they were spotted attending a private New Year's Eve party together at rooftop restaurant Attico in Downtown Philadelphia on Tuesday night, December 31.

In a video obtained by TMZ, Kendall was seen entering the building with the basketball star following her closely behind. The site reported that the two arrived around 11:30 P.M. local time and stayed for the clock to hit midnight. For the bash, the supermodel kept in chic and simple in a black shirt-dress as Ben opted for a matching look in a black T-shirt underneath a bomber jacket.

Footage of them inside the bash have also made its way out online, showing them appearing to be locking lips while ringing in 2020 together with other partygoers.

Kendall and Ben have been dating on-and-off since 2018. They were first reported to be romancing each other back in May 2018, but broke up four months later. The two then reconciled in November of that same year, though their relationship that time didn't last long either. They called it for the second time last May.

"Kendall and Ben are not together, but the two are on good terms," a source said of their second split at the time. "Both Kendall and Ben are extremely busy, and for now the relationship doesn't work for them. Kendall and Ben have taken breaks in the past and have gotten back together. They are really good at knowing when the relationship works for them and when it doesn't. Kendall is looking forward to a busy summer of working, but also spending time with her friends."

Prior to her romance with Ben, Kendall has been reportedly linked to several other stars that included Blake Griffin, A$AP Rocky and Harry Styles. The "Keeping Up with the Kardashians" star, however, had never confirmed the rumors. Meanwhile, Ben was previously in a relationship with Tinashe.