James Pallotta's Weston mansion

Pallotta, one of the highest-paid hedge fund managers and co-owner of the Celtics, is spending $21 million on his home in Weston.

The 21,000-square-foot property will house a movie theater, game room, and a wine cellar. The property will also have an inground pool and a carriage house with eight garage doors. Upon completion, the mansion will be the fifth largest living space in Massachusetts.