"Brad has always supported the museum, so he asked if he could participate on a higher level. But while the committee admires Brad's ambition, the fear is that he might be a little on the dumb side to serve on an art board. He doesn't even have a college degree," a source said.
Taking on a role on the museum's board may have been ambitious for Pitt as it was recently reported he and partner Angelina Jolie could be set for a move to the UK while he shoots a sequel to zombie blockbuster World War Z.
"Brad and Angelina are already planning for next year and have put the feelers out for properties. They would like to stay in Surrey like last time. Their kids are home-schooled so it won't cause much disruption," the source added.