Floren came to prominence primarily from his regular appearances on the weekly television series in which Lawrence Welk dubbed him as "the happy Norwegian," which was also attributed to Peter Friello.

A first-generation American of Norwegian immigrant parentage, he grew up on a farm near Roslyn in Day County, South Dakota with two brothers, Arlie and Duane (a.k.a.

After suffering from rheumatic fever as a child, his accordion playing saved his life, as the exertion strengthened his heart back to pre-fever performance.

He tried to enlist in the Army when the United States entered World War II, but was turned down for active duty because of heart damage caused by the rheumatic fever he had suffered as a child.

In 1950, Floren, who was performing with a music group known as "The Buckeye Four", went to a dance at the Casa Loma Ballroom in St. Louis, Missouri at which the Lawrence Welk Orchestra was then playing.

The number turned out to be "Lady of Spain", and from the overwhelming positive response from the audience, Lawrence hired Myron to be a permanent member of his band.

Headquartered in Fargo, North Dakota, the Myron Floren Orchestra played during the Welk show's off-season and during holiday breaks, becoming a regional favorite.

Among the annual events which he headlined were the German Fest in Milwaukee, Wisconsin; the Norsk Høstfest in Minot, North Dakota; the Strawberry Festival in Plant City, Florida; the Wurstfest and his birthday in New Braunfels, Texas; and the PolkaFest at the Welk Resort in Branson, Missouri.