The Wedding Party
Jonathan Blandford -- a.k.a. the groom
Rosanna Yuen Blandford -- Bride and Jonathan's wife
Adam Readhead -- Best Man
Julie Park -- Maid of Honor
Edward Blandford -- Groomsman and Jonathan's brother
Sarah Soifer -- Groomsperson
Raffi Krikorian -- Bridesperson
Raeghan Byrne -- Bridesmaid
Paul Graessle
-- Raeghan's date
Aidan Low -- Usher
Ricky Yuen -- Usher and Jonathan's new brother-in-law
The Blandford's
Elizabeth Blandford -- Jonathan's mom
Roger Blandford -- Jonathan's dad
Jack Blandford -- Jonathan's paternal grandfather
Janet Blandford -- Jonathan's paternal grandmother
Janette Blandford -- Jonathan's aunt
Fred Bos -- Janette's significant other
The Kellett's
Joanna Kellett -- Jonathan's maternal cousin
Huw Kellett -- Jonathan's maternal cousin
Richard Kellett -- Jonathan's maternal uncle
The Chadwick's
Diana Chadwick -- Jonathan's maternal aunt
Peter Chadwick -- Jonathan's maternal uncle
The Sheals'
Jenny Sheals -- Jonathan's second cousin, once removed
Derec Sheals -- Jenny's husband
The Wellings'
Jack Wellings -- Jonathan's great uncle
Mary Wellings -- Jonathan's great aunt
Peter Wellings -- Jonathan's second cousin, once removed
The Yuen's
Rhonda Yuen -- Rosanna's mom
Hamlet Yuen -- Rosanna's dad
The Chang's
Mimi Chang
Timothy Chang -- Rosanna's maternal cousin
Wendy Segal
Random Friends
Justin Cave
Brian Dean
Eric Ford
Nicole Klemenko
Delphine Le Cocq
Luke Matkins
Martha Montague
Ethan O'Connor
Christina Schofield
Nadia Vinson
Qian Wang
Benjamin Yoder
Andrea Zengion
Family Friends
Charlene Reichart
Thomas Prince
Mary Shull
Robert Shull
Maryanna Soifer
Thomas Soifer
Jesse Prince
Melissa Wu
Others
Havoc Pennington -- Friend from work
Amy Anderson -- Havoc's date
Lan Chang -- Friend from MIT that's not from Random
Sunmee Jang -- Friend from nerd camp