Reese Witherspoon shares sweet photos with look-alike daughter Ava

It's getting tougher and tougher to tell Reese Witherspoon from her daughter Ava Phillippe!

The 41-year-old actress shared a series of adorable photos with her look-alike daughter, Ava, 17, and her sons, Deacon, 13, and Tennessee, 4, on Instagram while on a tropical vacation.

Many Instagram users were quick to point out the mother-daughter duo's striking resemblance.

"Definitely twins! Your daughter is absolutely gorgeous!" one fan wrote.

Another added, "U seriously look like sisters!!"

We have major holiday envy!