Robin Williams' son Zak got married on World Mental Health Day

Zak Williams, the oldest child of the late Robin Williams, married fiancée Olivia June on Saturday, which also happened to be World Mental Health Day.

"I had the great joy of marrying my best friend @oliviajune today!" Zak tweeted, along with a photo of him and his new bride. "It went awesome and we couldn’t have tied the knot on a better day. #WorldMentalHealthDay."

Olivia, the founder and CEO of the Hey! VINA, shared a similar message on Twitter, writing, "Married my best friend and love of my life today. @zakwilliams you were already stuck with me forever, and now it’s legally so."

Zak, 37, and Olivia, 34, tied the knot at The Paramour Estate in Los Angeles, according to People magazine. Last year, the couple welcomed their first child together, a baby boy named McLaurin Clement Williams.

McLaurin was the middle name of Robin Williams, who died by suicide in 2014.

Zak, a mental health advocate, told People he’s "looking forward to building this life" with Olivia and their young son.