Guy Ritchie's latest productions have brought iconic investigator Sherlock Holmes to the silver screen.
But fans of the detective wouldn't have needed his services to work out that Guy's model girlfriend Jacqui Ainsley is expecting again.
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The blonde cupped a burgeoning bump as she and her movie maker beau attended The Dark Knight Rises premiere in London.
And if that wasn't clue enough, her radiant glow and complicit embraces with Guy could have solved the mystery of her growing tummy.
Since starting a family with the filmaker in September 2011, Jacqui, 30, has given new meaning to the term yummy mummy.
Just months after welcoming their son, Rafael, she poured her sylph-like figure into a backless red dress for the latest Sherlock unveiling.
She has clearly loved becoming a mother, and is now set to do it all again with the British film director – who has two sons Rocco, 11, and David, six, with ex-wife Madonna.
"This is the first time I've been a biological mother but we've got the two big boys and they absolutely dote on Rafael. They're always dancing with him and wanting to play with him." Jacqui recently revealed to Grazia magazine.
All the news as Duchess Kate's due date draws close...