The nearest rail station is Blackpool North Station, which is a 10-15 minute walk to the theatre at buggy pace. Regular services from Preston, Leeds, Manchester and Liverpool come into this station.
If you're travelling by bus, the Grand Theatre is ideally located 100 feet from the central drop point for most main bus links (by BHS).
Regular trams run the length of the Promenade if you would like to take the scenic route. For tram timetables visit blackpooltransport.com.