Meath play Dublin in the other last four contest.
Westmeath were first to name their team for this massive Leinster U-20 Football Championship semi-final.
Damien Gavin's side have already secured victories over Kildare and an epic penalty shootout win over Longford last week following a final score of 2-12 to 3-9.

In all, the high scoring lake county have hit 3-27 in the championship thus far and will be hoping their potent forward line will do the business again.
Eight clubs are once again represented in the starting team, Coralstown-Kinnegad, St.Lomans, Athlone, Ballinagore, The Downs, Milltown, Milltownpass and Killucan.
Gavin makes one change between the pipes as Sam Martin takes over from Michael Lynam of St. Josephs.
Westmeath starting XV:
Sam Martin; Josh Gahan, Charlie Drumm, Ciaran Daly; Enda Gaffney, Darragh Seery, Michael Byrne, Jack Murtagh, Ciaran Daly; Shane Fleming, Kevin O'Sullivan, Brandon Kelly; Jack Torpey, Ben McGauran, Devin Hill.
Meanwhile Declan Kelly has stuck with the same Offaly team that defeated Wexford by a solitary point last Thursday in Wexford Park.
Ten clubs have sent players to this starting team, Shamrocks, Bracknagh, Edenderry, Tullamore, Shannonbridge, Clara, Ferbane, Rhode, Ballinagar and Kilcormac-Killoughey.
Offaly starting XV:
Sean O'Toole; Fionn Dempsey, Kieran Dolan, Lee Pearson; Rory Egan, John Furlong, Aaron Brazil; Ed Cullen, Morgan Tynan; Ciaran Egan, Cathal Flynn, Cathal Donoghue; Cormac Delaney, Jack Bryant, Aaron Kellaghan.
Offaly's starting 15 for the @gaaleinster U20 Football Championship v Westmeath tomorrow (Thursday) evening is the same as started v Wexford.
— Official Offaly GAA (@Offaly_GAA) July 14, 2021
Watch the game live for free on Sport TG4 YouTube. Here's the link: https://t.co/dZHhAvFzv4 pic.twitter.com/okb3NrT8F6
The winner of this contest will face Dublin or Meath in the Leinster Final.
They meet one another in Navan tonight also from 7:30.
Our coverage of Offaly versus Weatmeath is brought to you by Property Partners Richard Cleary, William Street Tullamore.
Experienced in commercial and residential selling, letting and auctions. Local knowledge, nationwide! Find Property Partners Richard Cleary at propertypartners.ie
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