Sarah Hyland and Wells Adams have been together ''for months.''

The pair sparked rumours they're dating over the weekend when the brunette beauty posted a photograph of her and the 33-year-old hunk standing in front of a bloodied background wearing matching 'Stranger Things' Halloween costumes.

But, although they've only just publicised their romance, it's believed they've actually been seeing one another for a while but wanted to keep it under wraps until now.

A source told UsMagazine.com: ''They [Sarah and Wells] are casually dating and have been seeing each other for months.''

The 26-year-old actress' new relationship comes just months after she split from her long-term Dominic Sherwood following two years of dating.

A source said at the time of the break up: ''Hyland and Sherwood will remain friends, but notes that their relationship has simply ran its course.''

And Sarah later confirmed the split when she lamented about being single.

She wrote on Twitter earlier this month: ''The problem with being single isn't the fact that you're alone. It's that you can't puppy dog eye a guy into getting you Starbucks in bed.''

And when a fan suggested she could try dating apps, she said: ''Yuck gross. To each their own but dating apps aren't for me. I like the natural progression of a person slowly learning im crazy. (sic)''

Sarah and Dominic's split came as a surprise to fans as she had recently penned a sweet message to her other half to mark his birthday.

She gushed at the time: ''The best thing to hold onto in life is each other ... Happy Birthday @domsherwood.

''Thank you for inspiring me on a daily basis to be a better person. To not take things too seriously. And to remember the little things. You're my rock. (sic)''