21 March 1982 in Bergen) were born to parents (Hans Terje Ylvisåker and Helga Urheim) from the Sogn district of Western Norway, the older two of three brothers.

After a few years in Africa, the family moved back to Bergen, where the brothers received a musical upbringing and were trained in classical instruments.

During a performance, they were spotted by impresario Peter Brandt, who orchestrated their debut as professional variety artists at Ole Bull Teater in Bergen in 2000.

Members of the public were invited to try to beat the brothers at various tasks, with a reward of up to one million Norwegian kroner.

In 2011 they reprised their variety stage show with "Ylvis 4", premiering at the Ole Bull Theater with the entire run sold out before opening night.

Upon being renewed for a second season, the brothers created a production company, Concorde TV,[4] in order to retain rights and creative control of their work.

[5] A number of comedy and parody music videos, either originally featured on I kveld med Ylvis or used to promote the show, have been released onto YouTube and other streaming media.

"The Fox", produced by StarGate and M4SONIC, which was released on 3 September 2013 to promote the upcoming third series of I kveld med Ylvis, went viral on YouTube and received 31 million views in its first two weeks.

[1] Ylvis received offers for interviews, concerts, and major label record contracts from several countries following the release of "The Fox".

[citation needed] Their first performance abroad was on The Ellen DeGeneres Show in the United States, where they appeared on 20 September 2013.

On 15 November 2013 they performed on BBC Children in Need where they were joined on stage by Jedward, The Cheeky Girls and Bucks Fizz.

[10] On 15 October 2014, Ylvis released on iTunes a single titled "I Will Never Be A Star", which was recorded by their younger brother, Bjarte Ylvisåker.

[17] In 2019, both brothers appeared on the first season of Kongen Befaler (Norway's version of Taskmaster), and the series overall winner was Vegard.