It was first reported in September that the notoriously private couple were expecting a baby, and in January Lara's growing tummy was seen for the first time while the pair were on holiday in Palm Springs.
It is also believed that Lara and Sam were married in secret over Christmas, with reports sparked by Lara's decision to change her Instagram name to Lara Bingle Worthington.
The pair dated for 11 months before ending things in August 2006.
In 2017, Sophie confirmed the speculation surrounding their dalliance, sharing they had indeed "banged" on Probably Sophie's most famous relationship, the singer was once engaged to Good Charlotte member Benji Madden.
The decision was mutual and they remain amicable," her agent announced in a statement.