Well this is just plain adorable!
In the (above) Vine, which was posted to Rob's account, you see him, his son, and Zefron having a total G-rated blast—and looking unbelievably happy!
While Zac was dealing with backlash from revealing his rehab stint for cocaine addiction, the 49-year-old Parks And Recreation star defended his friend via Twitter revealing he was serious about recovery!
We love the idea of Rob mentoring the High School Musical actor, especially because he's been clean and sober for 23 years!
What an awesome influence!
Keep up that recovery boo, because we're rooting for you!