March 15 (UPI) -- Ashlee Simpson captured a cute brother-sister moment between her two kids this week.
"Brother sister love," she captioned the snapshot for her 404,000 followers.
Simpson split from Wentz in 2011 after of three years of marriage, and wed Ross in 2014. She and Ross, a 28-year-old actor and the youngest son of music legend Diana Ross, welcomed Jagger the next year.
"Knox is such a good older brother," the actress told E! News after her daughter's birth. "He's always saying how beautiful she is and wanting to hold her."
Simpson last released the album Bittersweet World in 2008, and is known for playing Cecilia Smith on 7th Heaven and Violet Foster on Melrose Place. She said in May that she's focused on her family and making a new album.
"I'll have more kids," the star told Wetpaint. "Not now, but soon."
"I've been writing music with my husband and that's been so much fun," she added. "We've just been finding out our sound in our music. We've written, like, 10 songs, but we're going to write a whole bunch more."