A crowd of about 50,000 is expected beneath the arch and the Seagulls will be well-backed by their own fans and neutrals.
The Seagulls will play in their first-choice blue and white stripes while Manchester City change to a black kit.
Tickets remain on sale via the Albion club website and direct from Wembley.
But those who cannot get to the game also have various options to help them follow the action.
The final takes place on Sunday with a 3pm kick-off and will be televised live by both Channel 4 and TNT Sports 1.
Channel 4 start their coverage at 2.15pm with Jill Scott and Maisie Adam.
All eyes will be on Wembley (Image: Bradley Collyer/PA Wire)
TNT have a 75-minute preview show from 10.30am and start their match coverage at 2pm.
The BBC are the radio rights holders and they will have match commentary on 5 Live, World Service, Radio Sussex and Radio Manchester.
Radio Sussex may well be the preferred option for those backing Albion and they are planning four hours of coverage from 2pm.
The match will be broadcast live in 76 territories across 14 different broadcasters and can be seen in the rest of the world via the Adobe Women’s FA Cup YouTube channel.
We will be reporting live from the game via theargus.co.uk/sport and our Albion-dedicated Facebook page.
And, if you are going to Wembley, look out for our photographer Richard Parkes taking pictures of Albion fans before the game.
These will appear on our website and in The Argus newspaper.