|Tom Hardy and his fiancée Charlotte Riley|
She said: "I've always been a keen letter writer and so Tom and I write to each other most days when we are apart - or at least every other day."
While the 31-year-old beauty feels "very honored" to be a stepmother to Tom's four-year-old son Louis - who he had with ex-girlfriend Rachael Speed - she is keen to take their relationship one step further and have "lots" of children of her own with the 35-year-old actor.
Charlotte - who met Tom in 2008 when they were both filming the TV adaptation of novel 'Wuthering Heights' - added to You magazine: "Hell, yes. I want babies, lots of them. Definitely, absolutely definitely.
"Louis is four and the most incredible, intelligent, creative little human being I have ever met - he is amazing. I feel very honored to be his step mum."
Emma Stone was "arrogantly confident" she would end up an actress.