Milo Langdon: Grandpa Steven is so Cool!

Liv Tyler takes son Milo, 2 1/2, on stage with her to watch granddad Steven Tyler (lead singer of Aerosmith) rock out during a concert at the Molson Amphitheater on Monday in Toronto, Canada. Steven is 59!!!!

Milo wore protective noise-canceling headphones just like baby Wyatt, Sheryl Crow‘s son. Royston Langdon, Liv‘s hubby and Milo‘s father, is a musician and the lead singer and bass player of the Rock band Arckid.