Penny O'Brien is an actress, writer, and songwriter born in County Wicklow, Ireland, and based in the United States. She has appeared in projects including Red Dead Redemption 2, For All Mankind, and 10 Things We Should Do Before We Break Up. O'Brien has written original songs featured in Scenes From The Underground. Her work spans film, television, video games, and music, combining performance and storytelling across multiple mediums.