The Church of England has published the following prayers to mark the occasion, and invites other denominations to make use of them:
A Collect for use after the Collect of the Day at BCP services
Almighty God, who hast set our gracious sovereign Queen Elizabeth upon the throne of this realm, and given her to surpass all others in the years of her reign: Receive our heartfelt thanks for her service to her people, confirm and encourage her in the continuance of the same, and keep her in thy heavenly wisdom; through Jesus Christ our Lord, who took the form of a servant for our sake, and reigneth now in glory with thee and the Holy Spirit, one God, world without end.
A modern-language prayer drawing on Philippians 2
whose Son Jesus Christ exchanged the glory of a heavenly throne for the form of a servant,
we thank you that you have given Elizabeth our Queen a heart to serve her people,
and have kept her devoted in this service beyond all who were before her:
encourage us by her example to serve one another, and to seek the common good,
until you call us all to reign with Christ in your eternal kingdom.