Sandra Bullock's son Louis is already calling Ryan Reynolds ‘Daddy’

Sandra Bullock and Ryan Reynolds‘ friendship heated up following a break to her hometown of Jackson Hole, Wyoming, two weeks ago and now they’re an item.

During the trip, Ryan was seen carrying Sandra‘s adopted 18-month-old son Louis on his back.

Ryan dotes on Louis like he’s his own,’ says our source.

Louis‘ face lights up when he’s around.

‘He’s even started calling him “Daddy“, which made Sandra melt.

‘She knew then that Ryan was “the one” – and it’s been on ever since.’

Sandra, 47, and Ryan, 34, have maintained that they’re just good friends but pals say they’ve been speaking daily and enjoying intimate dinners.

It’s perhaps no surprise they’ve finally gone public – Ryan was a shoulder to cry on for Sandra when she dumped hubby of five years Jesse James, 42, last year over his infidelity.

She then supported Ryan when he split with wife Scarlett Johansson, 26, in December after just 27 months.

Read the full story about Sandra Bullock and Ryan Reynolds – and see the pictures of them together –  in Now magazine dated 5 September – out now!

Now cover 5 Setember 2011

SEE PICTURES The loves of Sandra Bullock>>