The 7.4% abv brew is nearly black in colour and has flavours of vanilla, chocolate and coffee.
It comes in 75cl stoneware bottles designed to encourage sharing over dinner. It retails at between £10-14.
Kevin Newbould, sales manager for Evening Star, said: “We jumped at the chance to develop a real ale in honour of the last steam train ever built in the UK.
"It’s a real privilege for Box Steam Brewery and sits perfectly with our ethos and everything we do at the Brewery. Evening Star is elegant yet strong and dark, reflecting the character of the original locomotive.”
The original Evening Star train rolled out of Swindon works on March 18,1960.