The film is called Youth. Mr Caine is 82.
Rachel Weisz plays his daughter.
Here’s some blurb:
Caine plays Fred Ballinger, whose annual spa stay begins as an emissary of Queen Elizabeth arrives to offer him a knighthood — if he would only conduct his most famous composition for Her Majesty.
Her Majesty is renowned for doing musical deals in exchange for state honours.
The make-or-break factor in the film will be who does the conducting for Michael Caine. (And who they get as concertmaster, of course.)