Allyson is in love since her late teens. At the age of 18, she began living with her boyfriend at Washington Heights. When she was in her early 20s she tied her married knot but she had the difficult married life. She also welcomed two children from this married life. Her nationality is American and she is of white ethnicity. She has an average height and her net worth is unknown. Her brother Robert Downey Jr. is a renowned actor.
After Allyson's parents called off their married life, she joined an alternative boarding school in Vermont. She graduated from there as the top of her class in 1980. She also attended Colby College from where she earned her BA. She is also the graduate of Columbia Business School. During the early 1980s, she worked as a costume designer on rock videos. She also began her modeling and dancing career during that time. She became an addict of cocaine and drugs during her early 20s. At the age of 23, she founded Downey Management. She has also been working with Multiple Choice Productions since a long time. As a talented writer, she wrote several books and some of them are titled as Malachi's Fishbowl" or What Do You Do When You've Done Everything You Would Never Do and so on.