<P> Additionally , Rebecca Field appears as Gail , Shangela Laquifa Wadley as the drag bar emcee , Willam Belli as drag queen Emerald , Greg Grunberg as Jackson 's driver Phil , and Ron Rifkin as Carl . Lukas Nelson & Promise of the Real appear as Jackson 's band , Eddie Griffin appears as a local preacher and Luenell appears as a cashier . Marlon Williams , Brandi Carlile , Halsey , Alec Baldwin , and Don Roy King cameo as themselves . </P>
<P> Additionally , Rebecca Field appears as Gail , Shangela Laquifa Wadley as the drag bar emcee , Willam Belli as drag queen Emerald , Greg Grunberg as Jackson 's driver Phil , and Ron Rifkin as Carl . Lukas Nelson & Promise of the Real appear as Jackson 's band , Eddie Griffin appears as a local preacher and Luenell appears as a cashier . Marlon Williams , Brandi Carlile , Halsey , Alec Baldwin , and Don Roy King cameo as themselves . </P>
who is the band in a star is born
who is the band in a star is born
Lukas Nelson & Promise of the Real
Lukas Nelson & Promise of the Real