Elle Fanning shorts sports bra gym

Teen actress Elle Fanning headed to a Los Angeles gym on Wednesday wearing a skin-baring sports bra and tiny athletic shorts. We definitely think that's a lot of skin for a 15 year old!

Dressed in black and grey shorts and a black and white Nike sports bra, the leggy teen showed off her lean legs. She wore her signature long locks down and had a simple gold chain around her neck. Looks like the girl is on the go -- she barely had enough time to put her feet in her shoes!

The star has been hitting the gym hard this summer. The Super 8 star has been regularly spotted attending dance, yoga and other classes at the gym near her family's home in Studio City, Calif.

Fanning next stars in Low Down, alongside Lena Headey, John Hawkes, Glenn Close and Peter Dinklage. The film, which is due in theaters in 2014, takes a look at jazz pianist Joe Albany (Hawkes) and his relationship with his daughter (Fanning) as he contends with his drug addiction during the '60s and '70s music scene.