The 21-year-old model joined image sharing site Instagram on Wednesday Feb. 19. and inaugurated her account with a promotional picture from her no-gravity photo-shoot for Sports Illustrated.
"Check it out!!! #SoExcited #ZeroG #SI #SISwim50," the model wrote in the caption.
Upton announced the launch of the account in a tweet she posted for her 1.27 million followers last Wednesday.
"Launching my Instagram at the same time as @SI_Swimsuit !! Thanks to Si for all the gorgeous photos to get me started http://instagram.com/p/knmuMAK8_w/" the blonde beauty wrote.
So far, Upton's account only has nine posts, including a few behind-the-scenes pictures, photos with friends, and one selfie from the set of her upcoming film The Other Woman.
You can visit the account here.