(Cover) - EN Showbiz - Sandra Bullock and Ryan Reynolds are reportedly planning to adopt a baby.

The 47-year-old Oscar winner is already mother to 19-month-old son Louis who she adopted as a single mother last year following the breakdown of her marriage to Jesse James.

But Sandra and her The Proposal co-star have been spending an increasing amount of time in each other's company leading to speculation that they are going to build a family together.

The pair recently went on a trip to Jackson Hole, Wyoming where Ryan was like a doting father to Louis and was so completely taken by the little boy that he is planning to adopt him, sources told Star magazine.

"Sandra is blown away with what a great stand-in dad Ryan has become to Louis and how he treats him as his own," the insider dished.

"There is no way Sandy would allow Ryan to bond so tightly with Louis if she didn't see a future with him."

The 34-year-old actor has reportedly been vocal of his plans to adopt and is already making plans to give little Louis a baby sister if he and Sandra get married.

"They are a great team. Sandy and Ryan were best friends and love blossomed from a solid foundation," the insider added. "They share the same family values so they're powering forward." (C) Cover Media