The success of "The Fox" has included getting a children's book deal for Ylvis which would be centred around figuring out what the fox actually says.
Vegard and Bård are still to this day surprised by the attention their song "The Fox" got them.
"The Fox" was recorded at JAY Z's Rock The Mic studios.
"The Fox" was produced by production duo Stargate. Stargate have produced hits for Katy Perry and Beyonce.
If you can't tell, Vegard is brunette brother and Bård is the blonde brother.
Vegard and Bård are trained classical musicians! Vegard can play the double bass and Bård can play the violin.
Vegard and Bård have been comedians since 2000.
Ylvis' song "The Fox" went viral in September 2013 with over 200 million views.
Ylvis are Vegard and Bård Ylvisåker and they are brothers!
Ylvis is a comedy duo from Norway and they host a show called "I kveld med Ylvis", and in English, that means "Tonight, with Ylvis".