By Charlotte McIntyre Helen George wowed in a see-through black lace dress as she promoted her new acting role. The Call the Midwife star has been busy promoting her new role away from the BBC drama in The King and I on London’s West End. The 39-year-old wore a see-through black floral lace floor-length gown. She completed the look with high-wasted black hotpants and a matching black bra underneath. Later, the BBC star transformed into a completely different look for the West End production. Helen changed her hair colour from chestnut brown to blonde as well as changing into a red ballgown. Sh…