Neil Patrick Harris' twins are growing up so fast!
The 43-year-old actor took to Instagram on Thursday, Sept. 8 to share a sweet new snapshot of Harper and Gideon, both 5, all dressed up for their first day of kindergarten.
MUST SEE: Kate Middleton and Prince William Reveal the Royal Baby News All Fans Have Been Waiting to Hear — Get the Exciting Details!
Neil wasn't the only proud parent in Hollywood to post a photo of his children heading to class — click through the gallery below to see more celeb kids heading back to school!
"Kindergarten fits these two well. #FirstDayofSchool," dad Neil Patrick Harris captioned this photo of his twins!