Talk about a blast from the past.
The caption dated the photo "9-12-99" and included a baby emoji. At the time, Kate was just 17 and Hayden was a fresh-faced, 11-year-old child star.
For those who haven't seen the 2000 drama inspired by the true story of high school football coach Herman Boone (Denzel Washington), Kate played Emma Hoyt, the girlfriend of football player Gerry Bertier (Ryan Hurst). Hayden played Sheryl Yoast, the football-loving daughter of Assistant Coach Bill Yoast (Will Patton).
Last December, the proud mom celebrated her daughter's birthday and wrote a sweet tribute on social media for the occasion. "6 years ago today, I met the most amazing (not so little anymore) creature," she wrote. "Can't believe my baby girl is getting so big! Thanks for the beautiful cake Yana! #HappyBirthdayKaya #blessed."
On Jan. 26, the actress made a rare public appearance at the Los Angeles International Airport. A source told E! News that the Raising Helen star "seemed in great spirits."
"She seemed really upbeat, very relaxed and happier than we've seen in a long time. She radiated positivity," the source revealed. "She was really happy."
As for Bosworth, who's taken a few trips down memory lane recently, she tied the knot with husband Michael Polish in 2013. Polish has a 23-year-old daughter, Jasper Polish, from a previous relationship.
Back in 2015, the actress detailed becoming a stepmom. "If I can make a positive impact on her life, that will make me incredibly happy," she told Los Angeles Confidential magazine. "Having Jasper in my life takes me right back to being that age. It's challenging—it's a time when you're so hard on yourself, and not for a great reason, but because you haven't experienced enough to be able to understand a lot of things."