In 2013 Aldridge starred as Spencer in the multi nominated British Broadcast Awards online comedy series The Support Group produced by the creators of The Inbetweeners - Bwark Productions.

He was also part of the original London cast of the Cole Porter musical High Society, which starred Jerry Hall, at the Shaftesbury Theatre, after appearing in the UK tour.

Also in the West End, he appeared alongside Sheridan Smith and Michael Medwin in the 2006 season at the Open Air Theatre, Regent's Park playing Francis Flute in A Midsummer Night's Dream, Curtis in The Taming of the Shrew and Pup in Babe.

Aldridge played the Munchkin Mayor in the RSC production of The Wizard of Oz and also for the Royal Shakespeare Company, created the role of Bruce Bogtrotter in the development workshops of Matilda with music written by Australian comedian Tim Minchin.

He also played Roger Parslow in the National Tour of the Philip Pullman trilogy His Dark Materials, Dickon in the West Yorkshire Playhouse production of The Secret Garden as well as the role of Tootles in the original cast of George Stiles and Anthony Drewe's musical adaptation of J.M Barrie's Peter Pan at the Birmingham Repertory Theatre[3] and the West Yorkshire Playhouse, for which he features on the original cast recording album.