A phenomenal stand-up comic, Garrett’s breakout television performance was on the hit US late-night talk show Conan (TBS).
The performance came off the back of his breakthrough live show Sunflower which became one of the best reviewed and most talked about shows of Edinburgh Fringe 2018.

Garrett has since followed up the show with three further shows: Smile, Just Trying to Help and Never Had it So Good.
All three shows transferred to London before touring the UK and have been recorded by 800 Pound Gorilla Records to stream and purchase internationally.

In 2026 Garrett debuted his latest show Garrett Millerick: We Tried it Your Way at the Edinburgh Fringe.

In 2024 Garrett created, wrote and starred in his first sitcom, Do Gooders,on BBC Radio 4 and BBC Sounds.
The show boasts an incredible cast including Frank Skinner, Fay Ripley, Lisa McGrillis, Ahir Shah, Ania Magliano and Glenn Moore.

The show received widespread critical acclaim and was named a critic’s choice in publications including The Sunday Times, The Observer, The Telegraph, The Times, The Independent, The Daily Mail, The Guardian, The Radio Times and Chortle.

It was nominated for two BBC Audio Drama Awards (Best Sitcom & Best Comedy Performance – Frank Skinner) and joined Hancock’s Half Hour and The Hitchhiker’s Guide to the Galaxy in The Independent’s run down of The 27 Greatest Radio Comedies of All Time.

All 12 episodes of the first two series are available to stream on BBC Sounds.
A third series is currently in production and will air in 2027.

He previously created and co-hosted the hit lockdown podcast Laughable with Jayde Adams and Red Richardson which was picked by the Guardian as one of the funniest podcasts to listen to during the pandemic.