London, January 1: Actor-turned-musician Joaquin Phoenix sparked fears about his well being when he arrived at a star-laden party in Miami Beach sporting a huge scraggly beard.

Onlookers revealed that the 34-year-old, who announced his retirement from film in October last year, was looking bloated at the party.

They said that alongside Casey Affleck and P Diddy, he looked rather more cave dweller than Hollywood A-lister.

"For people who know Joaquin, it''s been an incredibly traumatic year, filled with chaos," the Sun quoted a source as saying.

"Everyone wants to help but nobody''s been able to break through. His bizarre behaviour has everyone worried. It''s just getting scary," the source added. (ANI)