Angela Kinsey and Warren Lieberstein
02/18/2009 at 03:00 PM EST
's Angela Kinsey has separated from her husband of eight years, writer Warren Lieberstein, PEOPLE has confirmed.
"Angela and Warren are taking some time apart to figure out what is best for [daughter] Isabel and for their relationship," says Kinsey's rep Tess Finkle.
The rep adds that the separation is amicable, saying, "They continue to be friends and spend time together with their daughter."
The pair welcomed Isabel Ruby, their first child
together, in May 2008.
Kinsey, 37, will have plenty of support at work: She is best friends with co-star Jenna Fischer, and Isabel's uncle Paul Lieberstein is also a co-star on the hit NBC show.
Reporting by ULRICA WIHLBORG