In 2006, she co-starred as Isolde in the romantic drama Tristan and Isolde.
But when she does, she makes everyone fall in love with her even more than they already did before.
Such is her persona that she brightens a room with her presence.
Only last year Miss Myles, best known for playing Lady Penelope in the 2004 film of Thunderbirds, told how happy she was with Tennant and said she wanted to start a family with him.
But the actor has been nursing his own heartache this year after his mother Helen died after a five-year battle with cancer.
With the great sense of humor and that mesmerizing blue eyes, hardly anyone can escape her charm.