Cheers! Famous Faces Toast Actor Nathan Fillion's Birthday

As the Castle star rings in his 43rd year, pals like Joel McHale and yes, Barbra Streisand, turn out to celebrate

TAKING THE CAKE

The Castle star, who turned 43 on March 27, blows out the candles on his Bittersweet Treats Bakery cake, one of many sugary indulgences guests sunk their teeth into.