So, who's the lucky(?) lady??
The pair crossed paths at Netflix's 2019 Golden Globes after-party, where they immediately hit it off.
According to E! News, he and friends Machine Gun Kelly arrived at the party together early on. After standing and chatting closely with Kate on the dance floor, they went and got cosy on a couch.
"She was very flirty with him and there were definitely some vibes going on," a source described. "Pete was smiling and laughing with her and she was all about him."
About an hour after this, the pair left the party.
A second source however did add, "They did not go home together."
We guess Pete is saying thank you, next to Ari.