They then went out and partied together in L.A. last night.
Wilmer was previously dating Demi for six years. Their split came as a huge shock to fans when they called it quits in June last year.
"This was an incredibly difficult decision for both of us, but we have realised more than anything that we're better as best friends," Demi wrote on Instagram when they broke up.
Chantel has been the first person Wilmer has been romantically linked to since his split with Demi, whereas Demi has dated and broken up with MMA fighter Guilherme Vasconcelos as well as Luke Rockhold since her split with Wilmer.
Now, she's single AF and belting out revenge tunes like "Sorry Not Sorry."