That wedding march doesn't seem to have made it to the
soundtrack for the movie. The printed version is also not available. Your best bet is to have a keyboard musician transcribe it for you.
Please note that songs listed in the movie credits cannot always be found on CD soundtracks. This is due to copyright and/or royalty fees mainly ... or ... the composer decided to never publish it for whatever reasons.
It is a beautiful piece I must admit ... it is available on CD (orchestral version) however ... a little under two minutes duration.
On a side note ... welcome to the forum - we hope that you will become a regular participating member here.
Kh ♫