I usually have a character in mind before I find a face, but, sometimes, a face sparks a character. Or it happens concurrently because my brain is weird.

Billie: She was originally Jacob Tremblay who I chose because of the mischief in his eyes. However, I knew I'd need someone who appeared slightly more female as Billie aged. Sophia Lillis in 'I'm Not Okay With This' looked like what I imagine grown up Billie would one day, so I went to see if there were pictures of her younger. She's in so many things where she appears androgynous when she was young, so she seemed pretty perfect.

Zach: I had 'bearded sweetheart' in my head. Colin Morgan has kind eyes, which was the deciding factor.

Eli: I really liked the playby Kayte had originally suggested (the boy from Durrells in Corfu), but he didn't fit the quiet guy I had in my head. Robbie Kay always has this serious look to him, and I love how his ears stick out.

Wallace: Murtagh from Outlander! He just fit the character so well. Bee convinced me with the words "eccentric old man," and I knew exactly which playby I would use.

Deanna: I needed someone nosy, and the post office woman from Larkrise to Candleford kept coming to mind, so I chose her.

Archer, Ned, and Thomas: They're Kayte adopts, and, honestly, their PBs were perfect so I went with them! (Esp Archer and Thomas)