Her forthcoming appearance in the BBC's Christmas special - a one-off, big budget adaptation of Bram Stoker's Dracula - may hold some clues.
"After I finished filming Dracula," says Myles, "I thought I'd quite like to paint one of the rooms in my flat this really cool blood-red that I'd seen on set.
Tennant met the Myles - who played Lady Penelope in the 2004 movie Thunderbirds - on the set of the sci-fi series.
Being a free spirited and an honest person may mean you are a good person.
boyfriend Dance dumped Myles while she was expecting the veteran to propose to her.
As told by an insider, Myles was devastated due to the break-up. They broke up in Myles announced on Twitter the birth of her son.
But this beauty seems to have a hard luck when it comes to relationships.