It seems Sylvester Stallone isn't the only knockout in his family!

The Rocky star took to Instagram on Sunday, April 10 to share an adorable selfie of himself alongside his two younger daughters, Sistine, 17 (second from right) and Scarlet, 13 (second from left) and the girls' friend Natalie Elattrache (far left).

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Trying to get my phone back.

A post shared by Sly Stallone (@officialslystallone) on

"Trying to get my phone back," the 69-year-old captioned the fun snapshot. We can't get over how fast his daughters have grown up, may we add!

RELATED: Rocky Stars Sylvester Stallone and Dolph Lundgren Reunite Over Lunch — See the Pic!

Sylvester and his wife, Jennifer Flavin — who tied the knot in 1997 — are also parents to an older daughter, Sophia, 19. The actor is additionally a father to sons Seargeoh Stallone, 37, and Sage Stallone (who sadly died from a heart disease in 2012 at age 36) with his first wife, Sasha Czack.

Click through the gallery below to more celebrity kids all grown up!