The pair - who are rumoured to be getting married in India on Saturday (23.10.10) - have chosen the ornate seats for their traditional Indian wedding ceremony which is set to take place at the luxury Aman-i-Khas resort in Rajasthan.
When they tried out the thrones Katy and Russell are said to have "burst out laughing".
The couple started the week-long Celebration last night (21.10.10) with a Bollywood-style feast featuring dancers and snake-charmers.
A source told The Sun newspaper: "They are very much keeping to Indian tradition. There will be feasting and dancing. And Katy will be painted head-to-toe in henna tattoos."
Rajasthan Tours manager Mohan Singh, whose company is helping to organise the event confirmed both Russell, 35, and 25-year-old Katy want a traditional wedding.
He told the USA Today newspaper: "This would be a colourful Rajasthan wedding, and both Brand and Perry will be attired in Indian wedding attires."
He also revealed the couple have hired 13 vehicles to take some of their 80 guests on tours of the Ranthambore National Park wildlife sanctuary in The Days following the nuptials.
Singh also revealed Russell and Katy will be staying in a luxury tent at the Aman-i-Khas resort, just outside the sanctuary, with guests staying at the nearby Vanyavilas and Sher Bagh resorts.