In 1999, she dated Brain Austin Green. Their relationship lasted till 2003. In 2002, Marcil had a daughter by this affair. In 2010, she got married to Carmine Giovinazzo in a secret ceremony. The relationship ended in 2012, when Marcil filed for a divorce stating irreconcilable differences as the reason. Their separation was finalized in 2013.

It was stated that when Corey was in the height of his career, Vanessa accepted that she was married to him for two years. However, when Vanessa’s career arose and Corey’s career got stagnant, she said that she did not marry him and he was just a person she knew for a very short time. However, they got married and stayed as partner for two years. They did not move in together during these two years.

Vanessa broke up with Green, a little after their son was born. Later in 2012, he filed a case on his former girlfriend that Marcil owes him 200 thousand dollars in 2000. Judge ruled against Marcil and informed that Marcil could sue him for the frivolous lawsuit.

There are rumors about Marcil being a lesbian. Her close relationship with Jillian Michaels, an American trainer who has announced her orientation to the public. There are a few sources that confirm that Jillian dated Marcil for a small period of time, just before her wedding with her former husband,Carmine Giovinazzo. The other sources refer their relationship as a trainer-trainee bonding that Marcil took up to look fit for her wedding. There were a lot of pictures of the two ladies holding hands and kissing in the public. When asked, they said that they both are best friends.

Marcil has a long boyfriend list, including Nathan Fillion, Vince Neil, Antonio Sabato Jr, Corey, Green, Tob Camilletti, Jeremy Piven and Ben Younger. Marci and Nathan were engaged for a very short period of time and they broke up. Later, Marcil admitted that her drug habit was the reason for the split.

The split was Carmine got her the marital house, the baby cloth line and also made him pay her legal fee and the spousal support. There were a lot of reasons that were rumored to be the cause of the split. Some say that she was gay and wanted to get back to her lifestyle. Some said that she was dating Tylor Christopher when she was still married. As of today, she is single and is not dating anyone in a serious tone. She has not announced her plan of getting back on the dating stool and her relationship with her ex’s are also not known.