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Leah Marie Liang Lewis (born December 9, 1996) is a Chinese-born American actress. She is best known for her roles as Georgia "George" Fan in The CW series adaptation of Nancy Drew (2019–2023) and Ellie Chu in the Netflix comedy-drama film The Half of It (2020). She also starred in a lead voice role as Ember Lumen in the Pixar animated film Elemental (2023), and portrays attorney Sarah Franklin in the legal drama series Matlock (2024–present).
| Year | Title | Role | Notes |
| 2007 | Nanking | Banner Girl | |
| 2020 | The Half of It | Ellie Chu | |
| How to Deter a Robber | Heather Williams | ||
| 2023 | Elemental | Ember Lumen (voice) | |
| 2024 | The Tiger's Apprentice | Räv (voice) | |
| TBA | Dog Years | Post-production |
| Year | Title | Role | Notes |
| 2006 | The New Adventures of Old Christine | Tess | Episode: "The Passion of the Christine" |
| Paloozaville | Leah | ||
| 2012 | Fred 3: Camp Fred | Spoon | Television film |
| Madison High | Peyton Hall | Pilot | |
| 2013 | The Voice | Herself - Contestant | Blind Auditions |
| 2015–2016 | Gamer's Guide to Pretty Much Everything | Lika | 2 episodes |
| 2016 | Best Friends Whenever | Alex | Episode: "Girl Code" |
| 2018 | Light as a Feather | Gabby Darwish | Episode: "Innocent as a Lamb" |
| The Good Doctor | Katherine "Kitty" Kwon | Episode: "Tough Titmouse" | |
| Charmed | Angela Wu | 3 episodes | |
| 2018–2019 | Station 19 | Shannon | 2 episodes |
| 2019 | The Gifted | Young Clarice | Episode: "home" |
| 2019–2023 | Nancy Drew | Georgia "George" Fan | Main role |
| 2021 | It's Pony | Max (voice) | 2 episodes |
| 2022–present | Batwheels | Cassandra Cain / Batgirl (voice) | Main role |
| 2024–present | Matlock | Sarah Franklin | Main role |
| Year | Title | Role | Notes |
| 2016 | Sing It! | Sophie Chu | Recurring role; 6 episodes |
| Teens React | Herself | 2 episodes | |
| Guidance | Liddy | Main role (season 2) | |
| 2018 | My Dead Ex | Amber | Episode: "The Z Word" |
| Song | Year | Artist | Notes |
| "Love Generation" | 2005 | Bob Sinclar featuring Gary Pine |
| Year | Award | Category | Work | Result | Ref. |
| 2013 | Young Artist Awards | Best Performance in a TV Movie, Miniseries, Special or Pilot - Leading Actress | Fred 3: Camp Fred | Nominated | |
| 2016 | Best Performance in a TV Series - Guest Starring Actress | Gamer's Guide to Pretty Much Everything | Nominated | ||
| Young Entertainer Awards | Best Guest Starring Young Actress - Television Series | Best Friends Whenever | Nominated |