Reese Witherspoon had two very special dates by her side as she rang in her 41st birthday on Wednesday; the actress celebrated her big day with her two eldest kids, 17-year-old daughter Ava and 13-year-old son Deacon, who posed alongside their famous mom in a snap that Reese shared to Instagram the following day. "There's nothing better than celebrating my birthday with my wonderful kids!" she captioned the shot, which shows Deacon and Ava looking very grown up (and resembling both their mom and their dad, Ryan Phillippe). Ava also shared a photo of Reese gearing up to blow out the candles on her cake, writing, "happy birthday to one of my best friends." Aww.