Michelle Keegan and Mark Wright have expressed their joy following the news that Mark's younger brother Joshua has announced he is expecting his first child with his wife Hollie.MORE: Michelle Keegan stuns in must-see behind-the-scenes snaps from Jess Wright's weddingOn Monday, both Joshua, 31, and Hollie, 29, shared a sweet series of photos - taken by renowned Essex maternity and baby photographer Just Tina - on Instagram in which they showed a snapshot of the baby scan.