Reese Witherspoon and Ryan Phillippe reunited for their son’s birthday. Deacon Phillippe just celebrated his 18th birthday, making their parents a little nostalgic over the passage of time.Reese Witherspoon opened up about being a young mom in her early 20sReese Witherspoon sells her media company for $900 millionA post shared by ryan (@ryanphillippe)Ryan shared a photo on Instagram, featuring the three of them.