Actress Jenna Fischer is pregnant

Updated: Jul 21, 2011, 08:53 AM IST

London: American actress Jenna Fischer has revealed she is expecting a baby boy with screenwriter husband Lee Kirk.

Fischer - best known for her role in "The Office: An American Workplace" - confirmed the news during an appearance on "The Tonight Show" with Jay Leno, reports People magazine.

When asked whether her parents were excited about the birth, the 37-year-old said: "This is the second grandchild, but first grandson."

Fischer, who first announced the pregnancy in May, revealed the baby is due in fall. "September we`re in what they call the home stretch," she said.

The Emmy Award winning actress was previous married to filmmaker James Gunn, but the couple divorced on 2007.