Ioan Gruffudd is known for playing one of the superheroes in Marvel’s “Fantastic Four.” Now he’s also making headlines for the way his wife says their marriage broke up — over social media.Gruffudd’s estranged wife, Alice Evans, says she found out he had a new girlfriend via Instagram and is so devastated, that she’s taking her heartbreak public. Evans says a photo Gruffudd posted to Instagram, of him smiling as he cozies up to 29-year-old actress Bianca Wallace, shattered her 13-year marriage.