Full steam ahead to fun
The rally includes the hissing and smoking steam engines, musical steam-powered organs, a fun fair, classic cars and motorbikes and tractors.
The historic home's grounds will also host a miniature steam engine display, children's workshops, a face painter, craft activities, food stalls and the Fun Time Express Land Train.
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Hide AdA spokeswoman for Harewood said: "This is the first year the rally will feature Thomas the Tank Engine, accompanied by Sir Topham Hatt, making it the ideal day out and a great way to let off some steam."
Tickets for the event, which runs from 10am to 5pm, can be booked for the event at www.harewood.org