In 2015 he illustrated the award winning series of twelve official UK Royal Mail Star Wars postage stamps to coincide with the release of Star Wars: Episode VII The Force Awakens. The hugely popular special edition sets featured characters from across the film series, including Darth Vader, Han Solo, Luke Skywalker, Princess Leia, Yoda, Obi Wan Kenobi and Boba Fett. The stamps also featured Finn, Rey and Kylo Ren from The Force Awakens.
Two alternative stamp concepts featuring Darth Maul and Luke's X-wing which were created during the development process, were made available as limited edition prints for Star Wars Celebration London and Celebration Orlando.
In 2017 following the success of the original editions, a new set of eight stamps were released featuring the creatures and droids of the Star Wars universe. These featured R2-D2, C-3PO, and Chewbacca from the original trilogy as well as BB-8, Maz Kanata, K-2SO from Rogue One and Supreme Leader Snoke and the Porg from The Last Jedi.
A final set of ten stamps was released in 2019, and featured more classic characters including Lando Calrissian, Grand Moff Tarkin, Count Dooku and Wicket the Ewok, as well as newer characters from the sequels trilogy.
As well as working with Lucasfilm Ltd. on Star Wars and Indiana Jones, Tween's work for clients in advertising, design and videogame projects include: Activision, Atari, Electronic Arts, Microsoft, Sega, Sony, Square Enix, Atlantic records, AGFA, Barclays, BMW, Budweiser, Fujitsu, GE, IBM, McLaren, Nestlé, Oracle, Puma, Santander, Sky and Starbucks.
As well as working with Lucasfilm Ltd. on Star Wars and Indiana Jones, Tween's work for clients in advertising, design and videogame projects include: Activision, Atari, Electronic Arts, Microsoft, Sega, Sony, Square Enix, Atlantic records, AGFA, Barclays, BMW, Budweiser, Fujitsu, GE, IBM, McLaren, Nestlé, Oracle, Puma, Santander, Sky and Starbucks.