The gold crown, encrusted with diamond, worn when Beckham, 39, tied the knot with former England footballer David, 38, in 1999, is to go under the hammer at Mayfair auction house Bonhams, reported Daily Mirror.
The East of Paris crown was designed by jeweller Slim Barrett.
"A lattice circlet with four openwork lozenges of irregular outline, each with pave-set brilliant-cut diamond detail and suspending brilliant and baguette-cut diamond drops, interspersed with four smaller diverse motifs, each with central brilliant-cut diamond bombe section mounted in 18 carat yellow gold with integral hair comb fitting at base," wrote an auction guide.