Barbara Jane Hatt Charles Topham Hatt
" Well, thank you, my dear. I knew this was my special birthday party, but I didn't know it was fancy dress!"
— Lady Hatt greeting her husband, Lady Hatt's Birthday Party, fifth season
Lady Jane Hatt (née Brown) is Sir Topham Hatt's wife and the sister of Sir Handel Brown I.
Lady Hatt occasionally helps her husband with railway business, and the engines sometimes go to extreme lengths to help throw parties for her birthday. She likes the railway, but had a certain dislike for
Annie and Clarabel until they were cleaned and repainted. Although her husband runs a railway, she likes a day out on a boat or in their car.
Percy had the job of taking Lady Hatt to Great Waterton for a surprise; to see the brass band.
The engines are extremely fond of her and like when she visits the railway or rides in one of their coaches. A kind and gentle woman, Lady Hatt usually praises the engines for their good deeds.
Season 1 - Thomas' Train ( cameo), Toby and the Stout Gentleman ( not named; does not speak), and Thomas in Trouble ( not named; does not speak)
Season 3 - A Scarf for Percy ( not named; does not speak) and Bulgy ( cameo)
Season 5 - Lady Hatt's Birthday Party and Sir Topham Hatt's Holiday
Season 7 - Bad Day at Castle Loch ( cameo), The Runaway Elephant, The Grand Opening, Bulgy Rides Again ( cameo), and Best Dressed Engine ( cameo)
Season 8 - Thomas and the Tuba ( does not speak) and Percy and the Magic Carpet ( cameo)
Season 9 - Percy and the Oil Painting ( cameo), Thomas and the Birthday Picnic ( does not speak), Tuneful Toots ( does not speak) and Flour Power ( mentioned)
Season 10 - Thomas and the Jet Plane ( cameo), The Green Controller, Topped Off Thomas ( cameo), and Which Way Now? ( does not speak)
Season 11 - Thomas Sets Sail ( does not speak), Toby's Triumph ( cameo), Thomas and the Runaway Car ( does not speak), and Duncan Does it All ( cameo)
Season 12 - Saved You! and Percy and the Bandstand
Season 13 - Double Trouble ( does not speak), Toby's New Whistle, Thomas and the Runaway Kite ( mentioned), and The Biggest Present of All ( does not speak)
Season 14 - Charlie and Eddie ( does not speak) and Jitters and Japes ( cameo)
Season 15 - Up, Up and Away!, Wonky Whistle ( cameo) and Fiery Flynn ( does not speak)
Season 16 - Express Coming Through ( cameo), Thomas and the Rubbish Train ( does not speak), Thomas and the Sounds of Sodor ( cameo), Muddy Matters ( cameo), and Happy Birthday Sir! ( does not speak)
Season 17 - Wayward Winston ( not named; does not speak) and The Afternoon Tea Express
Season 19 - Who's Geoffrey? ( mentioned), Diesel's Ghostly Christmas ( cameo) and Reds vs. Blues ( cameo)
Season 20 - Engine of the Future
1990 - Thomas and the Umbrella ( not named; mentioned)
1994 - Well Caught! ( mentioned)
1996 - The Play Train!, Lost Property!, The Brown Bear, and A Day at the Beach! ( mentioned)
1997 - 'Smile, Please!' and The Daisy Chain
1998 - Potty Parrot! ( mentioned), The Carnival!, The Easter Cake!, The Red Squirrel! ( does not speak), The Train Game, Look Alike ( does not speak), Toby and the Stout Gentleman! ( not named; does not speak), and The Big Speech!
1999 - Summer Fun!
2003 - Seaside Search! ( does not speak), Cook Controller! ( mentioned), Really Fast Food! and Feeding Time ( cameo)
2004 - The Grand Opening, Night Lights ( does not speak), Elephants and Engines ( cameo), Holiday Hat ( does not speak), Bulgy's Back! ( cameo), Monster Mistake! ( mentioned), A Nice Quiet Day ( not named), Ben's Blunder ( mentioned) and Travelling Thomas
2005 - Model Engines ( not named; does not speak) and Working Christmas ( does not speak)
2006 - Busy Bee
2007 - In for Treatment ( cameo)
2008 - A Spring Clean! ( mentioned), Toby's Triumph ( cameo), and Percy and the Left Luggage ( mentioned; mistaken for ), Dowager Hatt Giant Puffer ( possible cameo)
2009 - King Arthur ( mentioned)
2010 - Carnival Costume ( does not speak)
2011 - The Treasure Hunt, Puffer Portrait ( does not speak), and Perfect Panto ( does not speak)
2012 - Double Trouble ( does not speak), Sound Around ( cameo), Edward the Hero ( mentioned; mistaken for Dowager Hatt), Wonky Whistle ( cameo), Up, Up and Away! ( does not speak), Express Coming Through! ( cameo), and Thomas and the Rubbish Train ( mentioned)
2013 - Happy Birthday, Sir! ( cameo), The Fat Controller's Bedtime Story (Issue 660) ( mentioned), The Fat Controller's Bedtime Story (Issue 662), and New Year Party
2014 - Valentine's Surprise, Happy Birthday, Sir! ( mentioned), and The Afternoon Tea Express ( cameo)
Lady Hatt also appeared in the magazine stories,
Thomas and the Baby, A Friend's Party, A Hole in One, Dressing Up, Feeding Time, Happy Holiday!, Keeping Dry, Lights On, Lost and Found, Puzzles, Scaredy Puffer!, Snap Happy, Sodor's Strong Man, Station Mystery, The Cat Controller!, The Flower Dome, The Hallowe'en Special, The Tiny Engine, and Working Whistles.
According to Lady Hatt's Birthday Party, Lady Hatt's birthday is during the summer.
Lady Hatt is the only human character to have a namecard.
In the Magazines, Lady Hatt is commonly referred to as " Lady Topham Hatt". She is occasionally mistaken for Dowager Hatt also.
Lady Hatt has changed a few times through the series:
In the third season, Lady Hatt's appearance drastically changed.
In the seventh season, she had less makeup on.
From the twelfth season and onwards, she gained her red lips.
Her eye colour also changed several times, they were blue in season one, black in seasons three through nine, blue again in The Green Controller, black again from the rest of season ten until The Great Discovery, and brown from season twelve and onwards.