Jared Leto is an American actor and musician, known for his role in the movie Alexander and Requiem for a Dream, plus he is also the singer-songwriter and guitarist of rock band 30 Seconds to Mars.
Jared Leto has been spotted with a few tattoo designs, including a large circle and X located on his left forearm, this design is the Echelon which is part of the bands iconography.
The singer/actor also has a couple other tattoos, one being on his inner right wrist and another on his neck, which i believe is the symbol of the bands glyphs.
