E4's "Married At First Sight UK" premiere sparked controversy with groom Alex's "wife swap" suggestion and Kieran Chapman's fake teeth prank.

The premiere of E4's *Married At First Sight UK* stirred controversy when groom Alex suggested a "wife swap" if he wasn't attracted to his partner, prompting backlash from fellow contestants. Viewers reacted negatively on social media. Meanwhile, Kieran Chapman made headlines for a prank involving fake teeth at his wedding to Kristina, which resulted in laughter. Relationship experts anticipate a dramatic season ahead as couples navigate arranged marriages.