Jane dated actor and singer Julian Ovenden as her boyfriend for several years. In 2006, while she was on the set of the science fiction thriller movie Children of Men, she met Marc Singer. Marc Singer is an English documentary filmmaker and they began their romantic love affairs since 2007.
In the early 2009, Jane was spotted with Robert Godley. Robert Godley is a designer from United Kingdom and after few months of love life they announced their engaged on 6th of January 2010. They were so eager to continue this engagement in married life and be each other’s loving spouse but it didn't happen as they got separated in 2013. There is no any information about her married life and divorce.
When Jane was just four years old, she joined ballet lessons and began learning ballet dance but later she got interested in Broadway dancing. As a child she was enrolled at Professional Children's School. She was also enrolled at Rutgers University. Before she earned a spot in the movies and TV series, she appeared in several TV commercials like for video game Solar Fox, the Atari 2600, CBS Electronics and many more. In 1983, she made her feature film debut by starring the role of Cousin Vicki in the comedy movie National Lampoon's Vacation. She has also starred in several TV series like Law & Order: Special Victims Unit, Unbreakable Kimmy Schmidt and many more. She got her rise in fame after starring the role of Elaine Vassal in the TV series Ally McBeal. Her breakthrough role as an actress came in 2006 after she began portraying the role of Jenna Maroney in the TV series 30 Rock. She has been earning lucrative amount of salary annually and her net worth is said to be around $12 million.