Some actors can transform their entire presence with a costume, but the real magic often happens when they open their mouths. Think of Tom Hanks giving Forrest Gump his unmistakable Southern drawl, turning an otherwise ordinary voice into one of cinema's most recognizable performances. From exaggerated accents to unexpected vocal registers, Hollywood has plenty of performers who sound nothing like the characters audiences have grown accustomed to hearing.

The difference can be so striking that watching an interview with these actors almost feels like meeting an entirely different person. Here are 10 actors whose real voices might surprise even their most devoted fans.

For eight seasons, Hugh Laurie convinced audiences that he was the quintessential American medical genius, complete with a sarcastic drawl and the bedside manners of a particularly irritated house cat. As Dr. Gregory House in House M.D., Laurie delivered cutting remarks, medical deductions, and philosophical one-liners with an accent that made it difficult to believe he was born and raised in England. His performance was so convincing that many American viewers were genuinely surprised when they heard him speaking naturally in interviews.

However, Laurie's actual voice is unmistakably British, with a refined, resonant quality that sits worlds away from House's rough American delivery. The actor had already established himself as a comedy performer in the United Kingdom through A Bit of Fry & Laurie and Blackadder. His transformation into House demonstrated just how much vocal control can contribute to an actor's ability to disappear into a character.

Voice Actors Score 12.6% Wage Increase as SAG-AFTRA Members Ratify New Animation Contracts

But Hugh Laurie is hardly the only actor whose voice has left audiences questioning what they just heard. From performers who disappear behind convincing accents to those who create entirely new vocal identities for animated characters, the rest of this list proves that a familiar face can come with a surprisingly unfamiliar voice. 

Remember when Austin Butler became Elvis Presley? The actor immersed himself so deeply in the legendary musician's voice that audiences began associating his natural speaking style with the King of Rock and Roll. His Southern-inflected delivery in Baz Luhrmann's Elvis was particularly striking, capturing the rhythm, breathiness, and distinctive musicality of the singer.

His natural American voice is considerably different from the distinctive Elvis impression that dominated his Oscar-nominated performance. 

Karen Walker from Will & Grace could make even the most ordinary conversation sound like an expensive social scandal. With her high-pitched, deliberately exaggerated delivery, impeccable comic timing, and spectacularly judgmental remarks, Megan Mullally created one of television's most memorable sitcom personalities. Mullally's actual voice, however, is much deeper, richer, and more theatrical. 

Idris Elba has spent much of his career convincing international audiences that he is American. From Stringer Bell in The Wire to his numerous Hollywood performances, the actor has demonstrated an impressive ability to move between accents without making the transition feel like an acting exercise.

In reality, Elba is British, and his natural London accent is considerably different from the voices audiences associate with his American characters. 

There are few animated voices more recognizable than those of Sterling Archer and Bob Belcher. Both characters have become staples of adult animation, but the man behind them, H. Jon Benjamin, does not exactly resemble either fictional personality. His naturally understated, conversational delivery is far removed from the exaggerated confidence of the world's most dysfunctional secret agent.

Eleven might be one of the most recognizable characters in Stranger Things, but her quiet, occasionally hesitant American delivery is not how Millie Bobby Brown naturally sounds.

Her real speaking voice carries a distinctly British accent. Her performance as Eleven required her to adopt an entirely different vocal rhythm, particularly during the character's early seasons when her dialogue was deliberately sparse.

For an entire generation, Mark Hamill will always be Luke Skywalker, the farm boy from Tatooine who eventually became one of the galaxy's greatest Jedi. However, his voice acting career has taken him into considerably darker territory. His portrayal of the Joker in Batman: The Animated Series remains one of the most celebrated interpretations of the DC villain. Hamill's natural speaking voice is considerably more relaxed than the Joker's manic performance. 

Fran Drescher's unmistakable delivery as Fran Fine in The Nanny became a defining feature of the sitcom. Drescher's natural voice, however, is noticeably smoother and more restrained than the sitcom's deliberately heightened characterization. Although her New York roots remain audible, she does not speak with quite the same exaggerated cadence in everyday conversations. 

Linda Hunt has one of those voices that immediately commands attention. Audiences who primarily recognize her as Hetty Lange from NCIS: Los Angeles might not immediately associate her understated screen presence with the full range of her vocal work. Hunt's voice carries an unusual combination of warmth, authority, and narrative depth. She also famously voiced the narrator in the 1982 film The Year of Living Dangerously, a performance that earned her an Academy Award for Best Supporting Actress. 

Seth MacFarlane might be the ultimate example of an actor whose voice contains several personalities at once. The Family Guy creator has brought Peter Griffin, Stewie Griffin, Brian Griffin, and numerous other characters to life, often switching between them within a single scene. His ability to jump from Peter's unmistakable delivery to Stewie's sophisticated British-inflected voice is a significant part of the show's comedic identity.

Away from animation, MacFarlane has an entirely different side to his vocal personality. He is also an accomplished singer who has released albums featuring traditional jazz and big-band standards, drawing inspiration from performers such as Frank Sinatra. His smooth crooning voice is a far cry from Peter Griffin's chaotic antics, making his musical performances particularly surprising for anyone who knows him primarily through Family Guy.

An actor's appearance might introduce a character, but their voice can make that character unforgettable. From Hugh Laurie's American medical genius to Seth MacFarlane's animated ensemble, these performers prove that vocal transformations deserve just as much recognition as physical ones. 

‘Looney Tunes’ Voice Actor Eric Bauza, the Voice of Bugs Bunny and Daffy Duck, Dies at 46

Which of these actors surprised you the most? Share your thoughts in the comments.