Megan Fox has finally joined Instagram, posting a make-up free selfie to mark the occasion and show off her natural beauty.

The actress, who stars in the upcoming live-action Teenage Mutant Ninja Turtles movie (opens Aug. 8), joined the social network on July 3 under the handle "the_native_tiger."

Putting motherhood first, her tagline reads, "Child of the Cherokee Tribe... forest nymph... Lunar Leo mother goddss to 2 bohemian revolutionaires-my kamikaze free spirit & my peaceful warrior," referring to sons Noah, 22 months, and Bodhi, 5 months.

The actress shared a handful of other photos in the coming days, quickly amassing 1.6 million followers on the site. On Independence Day she wrote, "Happy 4th of July from LA," and posted a set of images including a selfie, a flower and the Los Angeles skyline.

Fox added another selfie while in the passenger seat of an SUV and puckered up for the camera, just like the millions of other girls who use the site do.

Unfortunately for fans, the actress hasn't gotten too into posting stuff as her last post came on July 7 in the form of a text photo reading, "Unicorns don't Do Homework."

Megan's not the only one to add photos on Instagram this past week... Jessica Simpson added a selfie, Paris Hilton showed off her bangin' bikini bod while taking in some surfing, and Lily Aldridge added a scorching hot lingerie modeling photo. See them all in the slideshow above!