Sean Penn sat grim-faced at Hugo Chavez's funeral on Friday -- one of a clutch of Hollywood stars who lionized the late Venezuelan leader, in defiance of America's fierce antipathy to his regime. Following a long tradition of Hollywood liberals, Penn was joined by Oliver Stone, Danny Glover and documentary maker Michael Moore in lauding the charismatic Venezuelan president after his death this week, AFP reported. Only Penn appears to have made the trip to Caracas for the lavish funeral of Chavez -- who died aged 58 on Tuesday after a long battle with cancer.