Jared Leto may have debuted his "Joker voice" during a recent 30 Seconds to Mars concert. Leto will take on the iconic role for the upcoming film, Suicide Squad.
Added:

Jared Leto Quotes

Jared Leto [on June Squibb]: I just want to put the rumors to rest: We are indeed dating.

Take a fondle … who's your favorite Oscar winner now?

Jared Leto [passing around his trophy in the press room]