US prosecutors said Anna Gristina, who now lives in Monroe, New York, as a legal US citizen, was the madam of a Manhattan sex service for 15 years.
The 45-year-old previously claimed she ran a matchmaking service but admitted the single charge of promoting prostitution as part of a plea deal at Manhattan Supreme Court on September 26.
At court today, a judge handed Gristina a six-month jail term followed by five years probation, the District Attorney`s Office said.
She may now be deported as a result of the conviction.
The charge stems from an incident in July 2011 when authorities say she arranged a tryst between two women and an undercover police officer posing as a client.
She was arrested on February 22 as she left a fundraising meeting for her business, prosecutors said.
Gristina spent four months in jail before being released on a £157,000 bond in June.
Prosecutors alleged that she made millions from the business, which was said to have had a roster of wealthy clients.
She lives on a 12-acre property in Monroe, which is about 50 miles north of New York City, and previously spent time helping abandoned pet pigs find new homes, her lawyers said.