Reese Witherspoon is a family girl!

The pregnant actresses, along with hubby Jim Toth and daughter Ava, turned up to support her son Deacon at his flag football game -- as they do every weekend.

Ava and Deacon's dad Ryan Phillippe was there on the sidelines as well, cheering his son's team to victory.

And what better way to celebrate than with a hot dog! Little Deacon scarfed one down after a long game. Meanwhile, his big sis Ava snapped shots from the sidelines with her new camera. Look how big she's getting! And how stylish ... her bright yellow dress, super-cool shades and cute summer sandals lead us to believe this girl is one to watch!