Washington, Mar 14  Gwyneth Paltrow suspects that Joaquin Phoenix''s plan to become a rapper is "a hoax".

The stunner cast doubt over her Two Lovers co-star's new ''music career'', telling MTV: "I''m not a hundred percent sure that that''s really going to be the case.

"I think that there might be some other explanation or something going on. I''m not quite sure what, but I can''t believe that he''s really going to quit forever to become a rapper. It seems odd."

Recently, the Gladiator star recently revealed he had quit acting to become a rapper, Contactmusic reported.

He has since made a string of bizarre public appearances, including two nightclub performances, the last of which ending in a fight.

Sceptics believe that the hip-hop endeavors are being staged as part of a prank project. (ANI)