Jennifer Love Hewitt has confirmed she is expecting her first child with her 'Client List' co-star and boyfriend of 15-months Brian Hallisay.The couple told UsMagazine.com: "We're so thrilled and happy to start a family."A source said the actress is approximately three months along and cannot wait to welcome her first child.The couple reconnected on the set of their hit Lifetime series and began dating last year but they previously worked on the NBC series 'Love Bites' together.Earlier this year Jennifer admitted she had enquired about the process of freezing her eggs as she was "worried" about ending up childless after a string of failed relationships with musician John Mayer and actors Jarod Einsohn and Jamie Kennedy.A source previously said: "She has been asking a few women she knows about freezing her eggs. [She] feels worried that she will end up single, since none of her relationships have been successful."If it doesn't work out with Brian, then she can still be a mum one day."The actress has made no secret in the past of her desire to become a mother.She said: "I would love to have babies. I'm obsessed with babies. I would love to have them one day."