Sadly, the brutal social media world wasn't quite as enamoured with the tattoo – but when some followers criticised the body art, Olivia was quick to stick up for her man.
"When people wonder why we do things like this... because we're utterly entirely completely hopelessly in love with each other, because we will mean it when we say til death do us part," she wrote.
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When it comes to declarations of love, Alex has pretty much nailed it. Six months into their relationship, he proposed during a romantic New Year's Eve celebration in New York.
Since then, the couple have shared their sweet moments online, and revealed that they are planning a wedding next September. Olivia told The Sun that they may make their own reality TV show documenting the run-up to their big day.
"We have had talks about doing a show," she said.
"Nothing has been confirmed yet but there are a few players in the game that are trying to get us to do a show on our wedding, so let's hope that works out.
"We'd love it, we'd take it on. I mean, it would be a laugh watching me go mental over planning the wedding.
"I'm a bit of a Bridezilla, people have said."
Alex has also admitted that he's keen to be a dad, telling MailOnline that seeing their mutual friend and fellow Love Island contestant Cara De La Hoyde pregnant has left him broody.
"I want to get [Olivia] pregnant on our wedding night!" he announced.
These two are just the gift that keeps on giving.
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