TMZ.com: Chris Hemsworth Rings in Birthday in Ibiza With Bro Liam, Matt Damon, Rita Ora - CHRIS HEMSWORTH MATT DAMON, RITA ORA, BRO LIAM ... Ibiza Bday Squad Goals!!! ... It's Chris Hemsworth's 42nd birthday ... and you can bet it wasn't your average celebration, because it brought all the big guns!