11/28/2007 AT 07:15 AM EST
Time for an office expansion!
"Yes folks . . . I am pregnant," Angela Kinsey, star of NBC's The Office
, confirmed on her Myspace blog
Tuesday. "[My mom] has already sent me baby booties and is quilting like a mad woman."
The 36-year-old actress – who's married to TV writer Warren Lieberstein – did not reveal the gender or due date.
"They say when you stop trying, that's when it happens – and that's how it went for us," she wrote, adding that she doesn't plan to do much press until after the birth. "The minute I found out I was pregnant, I went into this 'Momma Bear' mode of wanting to protect this little guy or gal that is growing inside me."
And costar Jenna Fischer has already been recruited to lend moral support. "I asked Jenna to got to prenatal yoga with me," Kinsey says of her pal (who's still recovering from a spine injury
last May). "Between her bad back and my belly, it is the perfect workout!"