James Franco and Kate Hudson share the same birthday (April 19th) but were born in a full year apart from each other. Franco was born in 1978 and Hudson was born in 1979.
The house they lived in was on Richmond Way, Shepherds Bush, London. The end house was painted to look old and distressed. See Google Maps to compare.
The name of the fertility doctor J. Johansson is the same as the movie cinematographer, Jørgen Johansson
One of the film producers is Tobey Maguire, who appears with James Franco in the Spider-Man franchise, between 2002 and 2007.