Lytton was found guilty of drink-driving, having been arrested in Belgravia in the early hours of January 30.
According to the Daily Mail, Lytton pledged to "live and learn" from her mistake, after she was fined £350 at the City of Westminster Magistrates' Court today.
Before the hearing, she tweeted: "In life we make mistakes... and have to deal with the consequences."
Lytton rose to fame playing Ruby Allen in EastEnders, before moving to The Bill where she played PC Beth Green. She also appeared on Strictly Come Dancing in 2006.