

Actor portrait · TMDB ↗
Character viewing guide
Syd BarrettCharacter guide · Rachel Keller
Sydney ‘Syd’ Barrett
Closeness begins with understanding a boundary.
Find a starting pointBehind the name
Meet Sydney ‘Syd’ Barrett
Rachel Keller portrays Sydney “Syd” Barrett in Legion. FX’s official introduction emphasizes her independence and tendency to keep others at a distance before her relationship with David. Her perspective is useful to follow in its own right, alongside the story’s shifting view of him.
Official source · FX ↗Watch who defines the distance
Notice when Syd chooses to approach someone and when she asks for space. Following her decisions, rather than assuming what another character thinks she needs, gives the relationship scenes their own point of view.
Your first watch
Where to start
Begin with Legion season one, episode one, then follow seasons two and three in order. The series develops its own mystery through the episodes; use its title guide for context rather than jumping into a later season for an individual character.
- 01

Legion
2017 · Open the title guide ↗
Follow the screen credits
Catalog appearances
3 entries · release order
These are the existing catalog records, including supporting roles, cameos and other formats. This list is not a required watch order or proof that every appearance shares one continuity. Future entries may change.
2017
- Legion, Season 1
February 8, 2017
2018
- Legion, Season 2
April 3, 2018
2019
- Legion, Season 3
June 24, 2019
Sources & context
About this profile
Profile information checked 2026-11-08. Viewing suggestions are editorial guidance. Appearance records and identity labels come from the existing catalog.
FX · Official Legion character introductions and cast ↗
FX · Official Syd Barrett performer profile ↗
TMDB · Rachel Keller portrait ↗
Background artwork: Legion. The portrait shows the performer.
How this catalog is put together ↗