Actress Kristen Bell and fiancé Dax Shephard have announced the arrival of their first child together.

The couple, who got engaged in January 2010, announced the birth of their first daughter on Thursday on their respective Twitter pages. They have given their daughter the name of Lincoln Bell Shephard.

Veronica Mars star Bell (32) and her actor fiancé, 38 year-old Dax Shephard, announced their pregnancy last November.

In the Twitter announcement, Bell wrote: 'My new roomate poops her pants and doesn't pay rent... basically @daxshepard11 pre-sobriety :) welcome baby Lincoln xo'