Amanda Seyfried's husband was not happy about her snogging her ex in ‘Mamma Mia 2’

Well, this is awkward.

By Katie Stow

Because we were so damn caught up in the ABBA-related excitement surrounding Mamma Mia! Here We Go Again we completely forgot about this terribly awkward detail in the sequel: That Amanda Seyfried was going to have to act alongside her real-life ex-boyfriend, Dominic Cooper.

Amanda and Dominic dated for about three years after falling in love on the set of Mamma Mia! (the first one). When Amanda was wildly in love with him she told People that crushing on him was "one of the easiest things in the world" because "you're put in a situation where you have to make out with each other. It's easy for things to get carried away."

Don't believe the romance? See this GIF for hard evidence:

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Between the first Mamma Mia! movie and the sequel, Amanda Seyfried and Dominic Cooper broke up, and Amanda moved on with Thomas Sadoski (who you may recognise from Newsroom). Amanda and Thomas are now married and have a baby of their own.

So, when Mamma Mia! Here We Go Again was pitched to Amanda, she must have felt pretty weird about reuniting with her ex-boyfriend to play his on-screen wife.

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She had a chat with The Mirror about the whole debacle, explaining that it did not sit well with Thomas.

Awkwardly, said ex, Dominic, has been posting pics of Amanda on Instagram recently. It's all in honour of the movie, but still, weird.

Now find out why Amanda Seyfried has the best dog EVER: