Jessica Simpson's best friend introduced fans to the couple's second child, a little sister for 20-month-old son Rocco, by posting a sweet snap of the newborn on Instagram.com on Friday (24Apr15).

In the accompanying caption, the new mum writes, "Meet the newest love of our life, Wilder Frances Faison".

The baby girl is Faison's sixth child - he also has four kids from prior relationships.

The Scrubs star wed Cobb in 2013.