Social media is currently speculating as to whether Joaquin Phoenix has secretly jumped ... the 'Joker' star's language when referring to his fiancée of just over five years.

Joaquin Phoenix is savoring the moment! After winning the coveted Best Actor prize at the Academy Awards on Sunday, Phoenix and his fiancée Rooney Mara made a pit stop in Los Angeles’ Koreatown ...

JOAQUIN, 49, and Rooney, 39, put on a loved-up display at the fourth annual ceremony - with the Joker star even fixing his fiancée's dress in front of photographers. ©News Group Newspapers ...