What big announcement is made when all of the friends interrupt chandlers bath in the one where chandler takes a bath?

In "The One Where Chandler Takes a Bath," the big announcement made when the friends interrupt Chandler's bath is that Monica and Chandler are engaged. This news comes as a surprise to Chandler, who is initially shocked and overwhelmed by the interruption. The moment highlights the close-knit nature of the group and adds humor to the situation.