Musically gifted member of the comedy duo Ylvis, performing alongside his brother Bard Ylvisaker. With his brother, he hosts a talk show called Tonight with Ylvis.
His professional career began in 2000 when he performed in the critically successful Ylvis - A Cabaret. With his brother, they shot to international fame with their viral hit "The Fox (What Does the Fox Say?)" in 2013.
He provided his voice for the animated film Spirit - Stallion of the Cimarron.
His wife is Helene Helgesen Ylvisåker; they have a son named Mads and a daughter named Emma.
He and his brother have collaborated with Calle Hellevang-Larsen, who was featured on the single "Massachusetts."