Actor, Comedian, Creature Performer…

A Welsh actor, comedian and creature performer based in London.

As an actor, Gethin trained at the Royal Central School of Speech and Drama.

He speaks Welsh, French, Spanish and English.

His screen work has been seen on the BBC, ITV, Channel 4, 5, Sky, Amazon Prime and at the cinema. You can watch Gethin the the recently released The Winter King on ITVx or The Boys in the Boat which is currently in cinemas or a variety of project available to stream.

On stage, Gethin has performed all over the UK and Internationally. He has been nominated for an OffWest End Award (Best Performance Ensemble) along with the cast of Starcrossed. Check out some reviews below!

Sublime, his debut comedy hour, was performed in Brighton and Edinburgh in 2019. BBC Wales even filmed it for their programme Wales at the Edinburgh Festival.

Still from Somewhere Boy (dir. Alexandra Brodski, DOP: Dan Atherton)

📷 Ruth Crafer

Henry V (Donmar Warehouse) [📷 Helen Murray]

Starcrossed (Wilton's Music Hall) [📷Pamela Raith]

Starcrossed (Wilton's Music Hall) [📷 Pamela Raith]

Acting

Recent Credits:

Film/TV

Einstein and the Bomb, Netflix/BBC Studios, dir. Anthony Philipson

The Boys in the Boat, MGM/Tempesta Films, dir. George Clooney

The Winter King, MGM+/ITVX/Bad Wolf, dir. Anu Menon

Wolf, BBC One/APC Studios/Hartswood FIlms, dir. Lee Haven Jones

Andor, Lucasfilm/Disney+, dir. Benjamin Caron

Somewhere Boy, Clerkenwell Films/Channel 4, dir. Alex Winckler/Alexandra Brodski

The Great (S2 & 3), Thruline/Hulu, dir. Colin Bucksey/Matt Moore/Ally Pankiw

The Outlaws, BBC/Big Talk/Amazon, dir. Stephen Merchant

Casualty, BBC Studios, dir. John Maidens

Doctors, BBC Studios, dir. Enda Hughes

Theatre

Romeo & Juliet, Shakespeare’s Globe, dir. Lucy Cuthbertson

Starcrossed, Wilton’s Music Hall, dir. Philip Wilson

Henry V, Donmar Warehouse, dir. Max Webster

Mold Riots, Theatr Clwyd, dir. Katie Posner

Seagulls, Volcano Theatre Company, dir. Paul Davies

Incident at Vichy, Finborough Theatre, dir. Phil Willmott

Showreel →

Spotlight →

IMDB →

Comedy

Gethin performed his debut comedy hour in 2019. Sublime was to return to Brighton in 2020 for is final performances where it all began until a little something caused that event to be cancelled…

His work is silly and surreal - usually clown based.

He also performs stand up comedy and has performed and written satirical sketch comedy for the acclaimed long running comedy show, NewsRevue.

Previous characters include: Jacques The Cat, DeeDee (the Australian Confidence Consultant) and Hans Kartoffelsalat (German Poet).

For more information on Sublime click below.

Sublime →

Press

“astonishingly versatile…a joyous gift for physical comedy, Alderman is an athletic, shape-shifting delight” - ★★★★★ WhatsOnStage

“[Gethin Alderman’s] virtuosic and often amusing versatility binds the show together.” - ★★★★ The Times

“Gethin Alderman plays all the other characters quite deliciously” - David Benedict, The Stage

“manages to make the scene changes both slick and silly, with little more than a few perfectly timed winks, groans and grins” - ★★★★ The Guardian

“A spellbinding performance” - ★★★★★ Broadway Baby

“A miraculous performer” - ★★★★ Attitude

“A powerfully muscular presence” - ★★★★ Buzz Magazine

“Boundlessly energetic presence” - ★★★★ WalesOnline

“ridiculously brilliant…his transformations are astounding” - ★★★★ Broadway World

“[I]t is Gethin Alderman that stands out as Bagsy…Alderman’s Bagsy is a heart-wrenching character who teeters on a sheer precipice as he tries to soothe his mental and emotional hurt” - Sitting on the Fourth Wall

“genuinely impressive…an unpredictable and irreverent hour of controlled chaos.” - ★★★★ The List

“a warm-hearted and mischievous performer” - ThreeWeeks