Allicia Botti is a world-famous Italian opera singer.
When she first visited the Island of Sodor, Thomas was chosen to take her to the theatre, but after Allicia Botti discovered a mouse in Clarabel and screamed so loudly that all the windows in Brendam were shattered, Percy was chosen to take her to the concert. She frequently appears in concerts at the Town Square.
Allicia Botti usually wears a cream coloured dress-coat, with black fur trim, over a blue dress and a black hat.
- Season 6 - It's Only Snow (poster cameo), Thomas, Percy and the Squeak and Thomas the Jet Engine (poster cameo)
- Season 8 - Spic and Span (poster cameo) and Percy and the Magic Carpet (does not speak)
- Season 11 - Toby's Triumph
- Season 13 - Play Time and Splish Splash Splosh (does not speak)
- Season 14 - James in the Dark (vocalises) and Being Percy
- Season 15 - Wonky Whistle (cameo)
- Season 16 - Muddy Matters (cameo)
- Season 18 - Emily Saves the World (not named; mentioned)
- The Great Discovery (mentioned in newspaper)
- 2003 - Thomas Goes Squeak!
- 2004 - Thomas and the Squeak!
- 2008 - Toby's Triumph (speaks in speech bubble only)
- 2010 - Play Time
- 2011 - Being Percy (cameo)
- 2012 - Wonky Whistle (cameo) and The Fat Controller's Bedtime Story (Issue 650)
- 2013 - Being Percy (does not speak) and Play Time
- Jules de Jongh (UK/US; thirteenth season onwards)
- Lena Meieran (Norway; thirteenth - fourteenth seasons)
- Fu Suzuki (Japan; sixth season only)
- Nanaho Katsuragi (Japan; eleventh season onwards)
- Anne Moll (Germany; thirteenth season onwards)
- Ewa Serwa (Poland)
- Blanche Ravalec (France and French speaking Canada)
- Susa Saukko (Finland; thirteenth season onwards)
- Elain Llwyd (Wales)
She plays The Scullery Maid in The Sword in the Stone (ThomasTenCents34526's Style)
- She is a scullery maid, who tells Sir Ector about stuff.
- Her television series model is currently on display at Drayton Manor.
- In Play Time, she vocalises "Habanera".
- In the CGI Series, her dress gained buttons, which only ever appeared previously on her posters in the sixth and eighth seasons. She also gained lipstick.