Her acting roles include Lana in Return to the Hiding Place, Tyra in Little Boy, Jocelyn Stewart in To Have and To Hold, Catie Reynolds in Disturbing The Peace with Guy Pearce and Pam Harris in Out of Death starring Bruce Willis.
[9] The same year she appeared as Tyra in Little Boy and starred as Jocelyn Stewart in To Have and To Hold, a drama film based on the novel written by Mary Johnston in 1900.
[10] In 2017, Greyson played Maggie in Broken Memories, an independent romantic-drama about the main hero Jasper's struggle with Alzheimer’s and his relations with the family and friends.
[11] In 2020, Greyson played Catie Reynolds in Disturbing the Peace, directed by York Alec Shackleton and starring Guy Pearce.
Since 2017, Kelly Greyson has been actively involved in civil campaigns to end violence against women and collaborating with PNG Tribal Foundation, a non-governmental charity organization based in Papua New Guinea.