'This Is Us' Casts Young Sophie (Exclusive)

Amanda Leighton - Publicity - P 2017
Courtesy of NBC

Amanda Leighton - Publicity - P 2017

Viewers of This Is Us haven't seen the last of Kevin (Justin Hartley) and his surprise storyline involving a marriage to his childhood sweetheart, Sophie.

As was revealed on the latest episode of NBC's freshman dramedy, titled "Three Sentences," a 10-year-old Sophie (Sophia Coto) and Kevin (Parker Bates) eventually grew up and married one another before things turned sour and they split.

In that same installment's present-day storyline, Kevin was pressed to choose between the two women he had been most recently involved with, Sloane (Milana Vayntrub) and Olivia (Janet Montgomery). However, he realized instead that it was Sophie (Alexandra Breckenridge) who still held a piece of his heart, and in a grand sweeping romantic gesture, he showed up on her doorstep, asking to meet for a cup of coffee.

Following a one-week hiatus, This Is Us returns Tuesday with "I Call Marriage," an episode that further delves into Kevin's romantic past with the return of Breckenridge. The episode also happens to take viewers back to Jack (Milo Ventimiglia) and Rebecca's (Mandy Moore) wedding day. 

Coming up though, the series has also enlisted Amanda Leighton in a guest-starring role as a younger Sophie, The Hollywood Reporter has learned. Exactly what age she will be playing is being kept under wraps, but considering the couple's long history and early marriage, late teens or early 20s seems plausible.

Leighton stars as Emma on the Freeform drama The Fosters, which is currently airing its fourth season. She has also guest starred on Fox's Rosewood and had a small arc on CBS' The Young and The Restless in 2013-14.

Kevin won't be the only character whose past comes under the lens in the upcoming episode of This Is Us. Series star Milo Ventimiglia (Jack) teased that the episode will also be a big one for Miguel (Jon Huertas).

"If after episode 15, you don't love Miguel or understand him or give him a chance, you might just be an unhappy person in general," Ventimiglia told reporters at a recent press screening.

This Is Us airs Tuesdays at 9 p.m. ET/PT on NBC.

Twitter: @amber_dowling