Renée Zellweger's Megawatt Smile Lights Up the Red Carpet in London

Renée Zellweger made a smiley arrival at the annual SeriousFun Children's Network gala in London on Tuesday. She bundled up in a camel trench coat and had some fun on the red carpet while posing for cameras. The bash benefitted Hollywood legend Paul Newman's charity SeriousFun, a global community that serves children living with serious illnesses and their families free of charge. It seems as though Renée has gotten into the spirit of giving recently. Just last month, she stepped out at the 13th annual LA County Walk to Defeat ALS, where she met up with pals Reese Witherspoon, Miley Cyrus, and Courteney Cox. Keep reading to see more from the event, then get inspired by even more charitable stars.