When you think of the Transformers movies, based on the iconic Hasbro toys from the 1980s, you probably think of Michael Bay's action-packed, explosion-filled saga, right?

The first Transformers film actually appeared back in 1986 in the form of the animated feature The Transformers: The Movie. We can hardly blame you if you’ve forgotten about this particular instalment. It pulled in a pitiful $5.8 million at the box office, equivalent to $17 million (£12.5m) in today's money. That's far from phenomenal when you consider that director Michael Bay transformed – pun intended – the series into a multibillion-dollar action bonanza.

Today, the franchise has pulled in an incredible $5.4 billion (£4bn) at the global box office.

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