ET spoke with Shriver and son Patrick about Katherine Schwarzenegger's recent pregnancy announcement.
The 24-hour event kicks off Friday, May 1.
The 29-year-old was visiting her mom on the set when she was roped into a segment about parenting.
The author took a commenter to task after they accused her of being self-involved and trying to '#stayrelevant.'
'I feel so incredibly blessed to be part of such a loving, supportive and strong family.'
The bride's half-brother, as well as some of her famous friends and family, all shared their love on Instagram after her wedding.
On Sunday, both Pratt and Schwarzenegger took to Instagram to gush about their wedding.
Kotb called Shriver the 'baby whisperer' after introducing her to her first child in 2017.
ET spoke with Shriver at the 3rd Annual Best Buddies Mother's Day Celebration at La Villa Contenta in Malibu, California.
Katherine was on hand to support her mom at the 3rd Annual Best Buddies Mother's Day Celebration on Saturday.
Maria Shriver is keeping it tight-lipped when it comes to her daughter Katherine Schwarzenegger's engagement to Chris Pratt.
From their first date to an engagement ring, ET breaks down their whirlwind love story.
The 28-year-old daughter of Arnold Schwarzenegger and Maria Shriver was spotted on a picnic with Chris Pratt over the weekend.
Schwarzenegger opened up to ET about how special his friendship with Bieber is. 'Midnight Sun' is in theaters March 23.
