Title of piece Iturbi plays

This was one of my parents' favorite movies, and I've just finished watching it on TCM--for the first time in ages.

Does anyone know the name of the concerto Jose Iturbi plays just before Mario Lanza's debut (when he sings Celeste Aida)?

I've loved it since I was a kid and have heard it in other old movies, and I need to know!!

Thanks!