Hemsworth, 23, hit the festival to attend a promotional event for Hunger Games sequel 'The Hunger Games: Catching Fire' with co-star Jennifer Lawrence. The pair posed for photos with their new co-star Sam Clafin, cast last year in the coveted role of Finnick, reported Us magazine.
Cyrus, 20, is in LA and currently busy with her new studio album.
Hemsworth arrived at the Belvedere party's VIP Room on Saturday with a small group of male executives and also spoke to two female fans, who approached the table.
