Jake Gyllenhaal and his sister Maggie jetted to Hawaii at the weekend (23-24Jul11) to attend their dad's wedding.
The Hollywood stars watched as their filmmaker dad Stephen Gyllenhaal tied the knot in an intimate ceremony on a beach on Oahu's North Shore.
The siblings went barefoot and donned flower garlands around their necks for the nuptials, which were shared with just 30 guests.
Stephen Gyllenhaal split from Jake and Maggie's mum, screenwriter Naomi Foner, in 2009.