Decked out in a bright blue suit, the former American Idol host couldn’t have looked sharper, even if he didn't exactly match his younger sister's bridesmaids.
"Trying to fit in," Ryan captioned a photo shared to Instagram from the bridal party's pre-wedding toast. "Final countdown!"
Meredith and her new husband, TOMS senior executive Jimmy Leach, exchanged vows at an intimate but lavish ceremony in Mexico that was attended by family and close friends.
After the two tied the knot, Ryan, his parents and the newlyweds posed on the front steps of the venue for a beaming family photo. "Congrats to Meredith on your amazing day and welcome to the family Jimmy!" Ryan captioned the Instagram pic.
He also shared a heartfelt photo with his little sis, who looked beautiful in an elegant Vera Wang gown, marveling at just how "stunning" she looked on her special day.
Leading up to the wedding, Ryan made sure to take his Man of Honor duties very seriously, including helping Meredith pick up her gorgeous gown. "Man of honor duty #1 -- make sure she’s got the dress. check!" Ryan shared.
This isn't the first time this year the 41-year-old radio DJ has been in a high-pressure position this year. In May, Ryan had gave a rousing commencement speech at The University of Georgia, admitting to ET that he was "scared to death" to mess it up. Check out the video below to hear more.