Lettice Knollys married Robert Dudley, Earl of Leicester on 21 September 1578 at around seven o'clock in the morning. Only six other people were present at the Earl's country house of Wanstead Hall in Essex; among these were the bride's father and brother, Francis and Richard Knollys; the bridegroom's brother, Ambrose, Earl of Warwick; and his two friends, the Earl of Pembroke and Lord North. The officiating chaplain Humphrey Tyndall later remarked that the bride wore a "loose gown" (an informal morning dress), which has triggered modern speculation that she was pregnant and that the ceremony happened under pressure from her father. The marriage was, however, in planning between Leicester and his wedding guests for almost a year. While Lettice Devereux may well have been pregnant, there is no further indication as to this. The marriage date coincided with the end of the customary two-years-mourning for a widow.