But she's not the only Baldwin whose got it going on.
Her cousin Hailey Baldwin (above, left) was spotted at the After Earth premiere looking pretty darn good herself!
So Ireland took to Twitter to clarify to the world who is the cutest one of all!
"Who is the cutest Baldwin? Me. Durka durka. Yeah, sure she's pretty, but does she make you laugh and a killer PB & J?"
Can't argue with that logic!
We're sure Ireland meant it all in jest, and isn't actually trying to start a competition with her cousin!
Or at least we hope so!
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[Image via WENN.]