Bux will be modelling La Senza's 'full support' range for women with larger busts. Linekar has been dating with Danielle Bux from last September.
Lineker has four sons George, 16; Harry, 14; Tobias, 13; and Angus, 12; from his 20-year marriage to Michelle Cockayne, which ended in divorce in 2006.
Bux has a daughter Ella from her husband ex-Coventry City player Adam Willis.
