The 37-year-old actor was spotted attending the KROQ Almost Acoustic Christmas concert in Los Angeles this weekend with Mara and she was seen wearing a diamond ring, according to E! News.
Jonathan and Mara made their first official appearance as a couple back in September and then she supported him at an awards show in October.
“Congratulations Sweetheart on your award at the #IrishPostAwards. So lovely to share this wonderful evening w you. Xo,” Mara wrote on Twitter with the photo featured here.
Congratulations to the happy couple if the engagement news is true!