Actress Melissa Joan Hart has assured fans her pregnancy will not disruptfilming on her U.S. TV sitcom Melissa and Joey - because the cast has already completed production on its second season.

To all the fans concerned about Melissa&Joey will be affected by my baby bump;don't be! We finished Season 2& start 3 after baby arrives!

Earlier this week (begs17Apr12), the former Sabrina The Teenage Witch star, 36, confirmed reports she was expecting her third child with her husband Mark Wilkerson - but not everyone was as ecstatic about the pregnancy news as she was, and on Thursday (19Apr12) she was forced to take to her Twitter.com page to calm fans' fears that her unborn baby would delay plans for a new season of the popular family show.

She tweets, "To all the fans concerned about Melissa&Joey will be affected by my baby bump;don't be! We finished Season 2& start 3 after baby arrives!" Season two of Melissa and Joey is due to premiere on 30 May (12).

Hart and Wilkerson wed in 2003 and are already parents to sons Mason, six, and Braydon, three.