Evan Ross enjoyed a family trip with wife Ashlee Simpson and their daughter over the weekend.
"#familytrip #lakeAustin loved every minute of it!!!!!so much love," he captioned the picture on Instagram.
Ross brought Jagger to watch his mom, singer Diana Ross, perform at ACL Live at The Moody Theater the night previous. He posted a video of Ross' performance online.
"Me and my baby girl watching MOMMY. You are everything MOM. Baby girl loving her Grand Mommy," the star wrote.
Simpson is also mom to 8-year-old son Knox with her ex-husband, Fall Out Boy bassist Pete Wentz.
"Knox is such a good older brother," the singer told E! News in October 2015 after Jagger's birth. "He's always saying how beautiful she is and wanting to hold her."
Ross is known for playing Charlie Selby on "90210," Messalla in "The Hunger Games" movies and Diver Hawkes on "Wicked City."
He will next star in "Buckout Road" with Dominique Provost-Chalkley and Danny Glover.