Voice coaching

an actor design the voice and speech of a character

in the context of an on-camera, stage, radio or animation voiceover production. The dialect coach often does original research on dialects and speech patterns, prepares training materials, provides instruction and works on lines with the actor.

issues of credibility, consistency, and clarity. A dialect coach may

also be employed to help comedians hone impressions of celebrities, to train non-actor public speakers in vocal character and delivery, or to help singers improve in diction and attain a balance between tone and articulation, especially when singing in a second language.

hired by the line producer during pre-production to begin preparing

cast far in advance of the first day of principal photography. Dialect coaches may work with any members of the cast, but are brought in especially often to work with celebrity actors who have been cast in roles which require accents other than their own or even the performance of dialogue in languages unknown to the actors.

Therefore, frequently, the actors themselves will ask Production to hire a particular coach.

acquire any accent or dialect (a regional variety of an

accent) with the specific lilt, rhythms, intonations and sound changes intrinsic to each individual region a character represents.
In order to create truthful characterizations and performances, actors must have access to authentic sources for visual as well as audible aspects of accent and dialect.
The Visual Accent & Dialect Archive (VADA) is an archive of curated video clips from around the world, providing both auditory and gestural information about an accent or dialect.

her British accent for upcoming movie The Hustle.
The actress had

to hire a dialect coach to help her for the new comedy, as she only discovered her character wasn't from her native U.S. at the last minute.

Hathaway explained, "I found out I had to do it (accent) a week before we started shooting.I thought if I didn't do it, it wouldn't make a difference, but the director (Chris Addison) insisted. I've done it before and it hasn't always gone well, and it is so stressful to see someone struggle through an accent, so I got a dialect coach and made the best of it."

for her role in "Tolkien" because she wanted to get

her British accent in the film absolutely spot on.
"There's an extra level of pressure. I worked with a dialect coach as I needed it to be absolutely spot-on,“ Lily Collins said

She wrote in an article some tips for people hoe

to improve their pronunciation:

Activity to Find your English Voice!
Everyone has a different voice- there are no wrong choices.
Choose 2-3 people who you’d like to emulate when you speak English.
This is an exciting opportunity! You get to choose to be a new person!
The people you choose could be actors, or characters.
Find clips of these people.
Record the audio of the clips.
Train your ear.
Record yourself mimicking the sample clips of the people you’ve chosen.
Listen to the clip, and then listen to yourself. See how well you are matching up!