She is best known for her role as Jennifer Hart on the mystery television series Hart to Hart — , for which she received nominations for two Primetime Emmy Awards and five Golden Globe Awards. Her parents divorced during her childhood. Powers was estranged from her father, who was Jewish, whom she barely refers to and whose name is never mentioned in her memoir One from the Hart , in which she refers to the "tension and unhappiness created by my father's presence". Her mother, who died in Los Angeles from pneumonia at 96 years of age,  was known late in life and in local obituaries as Julie Powers.
Currently 14th in the line of succession to the Monegasque throne , she has been a singer, swimwear designer and fashion model. She is the youngest of their three children, after Caroline and Albert II. Her godparents are her maternal uncle John B. Kelly Jr. She said, "There was a lot of pressure on me because everyone was saying that I had been driving the car, that it was all my fault, that I'd killed my mother
She is a fourth generation wrestling promoter as a member of the McMahon family , she has worked for WWE since she was a young girl modeling T-shirts and other merchandise for various WWE catalogs working her way up to receptionist, then in various front office jobs up to and including her current CBO position. After a brief on-screen relationship with Test , she was engaged to Triple H — whom she married both on-screen and later in real life — which resulted in The McMahon-Helmsley Faction storyline. After making only sporadic appearances for several years, McMahon began appearing regularly on Raw in as the Raw brand general manager before disappearing once again. By mid, McMahon returned to regular on-air appearances in the WWE, this time under the gimmick of an unctuous, judgmental, bullying owner along with on-screen chief operating officer , her husband, Triple H. From to , they acted as a power couple known as The Authority , making what were often shady decrees while claiming only to be concerned for "what's best for business," all the while romanticizing each other in the process with public displays of affection.
Sadly, both of her parents are no more in the world. Her father passed away on 13 November while her mother in The years-old amassed her educational qualifications by studying media studies at Barnsley college and doctorate from the Leeds Beckett University Headingley Campus.