Teilz is from Arizona, and has been DJing since she was 16 alongside notable names including actor Elijah Wood.
He has been in nine celebrity relationships averaging approximately 2.5 years each.
Rooney Mara and Joaquin Phoenix are finally making things official, but their relationship has always been low-key.
The 39-year-old actor — who was most famously linked to Liv Tyler in the 1990s — is dating DJ Allie Teilz, 20, a source confirms to Us Weekly.
The two were spotted out and about on Saturday, Nov.
They were also spotted during a pre-Cannes breakfast outing in California in early May, where Mara matched Phoenix’s blue-striped sweater with her own yellow-and-brown-striped one.