Pippa Middleton's wedding to James Matthews is already one of the most talked events of the year.
Just a few weeks ago, it was revealed that the average Australian wedding now costs around $90,128 - a lot more than we would've guessed - and now wedding planning app Bridebook has estimated the expected costs of Pippa's big day.
Through breaking down each separate element of the day and using an analysis of 170,000 weddings, the website estimates that the wedding will cost a whopping $435,167 AUD (converted from £246,949).
That's almost five times more than the average Australian nuptials.
Here's the breakdown of what the couple will be spending on what.
Dress – $17,627 (£10,000)
Giles Deacon is rumoured to be the designer behind the bespoke dress. The designer made Abbey Clancy's for £10,000, so we can expect Pippa's to cost around the same (if not more).
Veil – $3,525 (£2,000)
This is expected to be made by famous milliner Stephen Jones.
Bridesmaid outfits – $3,966 (£2,250)
The site says that the average cost of a designer bridesmaid dress is $1,322. The average number of bridesmaids in the UK is three, however, we're unsure of the exact amount Pippa will have.
Wedding rings – $35,081 (£19,900)
The wedding rings are said to be from Cartier. A diamond-encrusted ring for Pippa would be around $27,324 and a platinum band for James about $2,538.
Hair and make-up – $2,996 (£1,700)
The expected team is Hannah Martin of Bobbi Brown and Richard Ward (who got Kate ready for her wedding).
Flower girl and page boy outfits – $2,993 (£1,698)
Nicki Macfarlane, who provided the flower girls outfits for the royal wedding, will likely be creating Prince George and Princess Charlotte's custom outfits.
Floristry – $28,2070 (£16,000)
Luxury florists Lavender Green are expected to be providing flowers for the day, with Bridebook noting that marquees always require a lot more floristy and decorations than a venue.
Cake – $4,584 (£2,600)
Domino Purchas or Rosalind Miller are thought to be behind the cake, both of their six-tier cakes start at this price.
Groomswear – $10,664 (£6,050)
James Matthews is expected to wear a bespoke suit from Saville Row.
Venue – $114,597 (£65,000)
The wedding is taking place at the Middleton's family home, but they will still need to provide luxury marquees - especially in the unpredictable May weather.
Catering – $123,408(£70,000)
Bridebook says, "top luxury London caterers will charge over £170 ($299) per guest." Admirable Crichton are expected to be the caterers for the wedding, with around 15 chefs and 2,000 canapes expected.
Decoration – $10,578 (£6,000)
This includes lighting, dance floors and bar hire.
Videography – $7,053 (£4,000)
Luxury videographers generally bring a team to capture all angles, plus a drone or two.
Music – $11,901 (£6,750)
Including music for the reception, a band and DJ for the party.
Entertainment – $2,644 (£1,500)
Children's entertainers (like Kate and William had at their wedding) and a photobooth are expected.
Church fees – $803 (£456)
The most important part and also the cheapest.
Stationary – $9,035 (£5,125)
Invitations, menus, save-the-dates and the Order of Service.
Wedding favors – $1,234 (£700)
Bridebook is expecting something "low-key and personal", such as a jar of honey.
Transport – Free
Jame will likely be able to borrow a stunning car at no cost.
Facilities – $7,052 (£4,000)
This is no place for any old Portaloo.