Johnson was born in Decorah, Iowa. She played Ellen Grant on Somerset (1970-1976), along with other Star Trek regulars Michael Nouri (1974-1976), Barry Jenner (1974-1976), George Coe (1971-1972) and Marc Alaimo (1972-1973). Georgann also acted on Another World, another 1970 show that featured future Star Trek actors. In addition to Johnson, the show starred Steven Culp (1982), Jennifer Lien (1991-1992), Barry Jenner (1976-1977), Kelsey Grammer (1985-1985) and Roxann Dawson (1985). In 1980 she acted in Health with Alfre Woodard and in Looker with Barry Jenner. She acted with Brian Thompson and Ron Perlman in 1985 in Our Family Honor. Two years later, in 1987, she had a role in Blind Date with Armin Shimerman, George Coe and John Larroquette. One year later, in 1988, she starred with John Gl