The two Brits play Queen Elizabeth I and the young Earl of Oxford in the new Shakespeare drama and Richardson admits the intimate scenes between the pair were extra awkward.
She explains, "I first met Jamie - OK, I'm finally letting out something - at my daughter's school. Enough said. He was in a school play and my daughter said, 'Oh that's Jamie Campbell Bower; he's just been cast in Sweeney Todd with Tim Burton.'
"Cut to three years later and I'm like, 'Come here!' We decided to keep that under wraps until now because, let's face it, that's weird! Life is better than art. Anything is possible!"