May 29, 2013 at 8:04 AM ET
For many, Ryan O'Neal will always be the fresh-faced all-American star of films like "Paper Moon" and "Love Story." But in his latest appearance, he's beaming about a new role -- as great-granddad.
The 72-year old posted photos on Twitter and Facebook over the Memorial Day weekend, featuring himself at oceanside holding the latest addition to the O'Neal family. "Had a wonderful day with my new great-grandson Sidney," he tweeted. "Happy #Memorial Day to all!"
According to People, Sidney is the grandson of Griffin O'Neal, Ryan's son; Griffin's sister is the actress Tatum O'Neal.