Grateful is one of two winners out of Tepin (Bernstein), a multiple Grade 1 winner in the US, a Grade 1 winner in Canada and a Group 1 winner in England. Champion grass mare in the US in 2015 and 2016, she won 13 of her 23 starts, 11 of them stakes, and six at the highest level, including the Grade 1 Breeders' Cup Mile, the Grade 1 Woodbine Mile S., the Grade 1 Just A Game S., the Grade 1 First Lady S., the Grade 1 Jenny Wiley S. and the Gr.1 Queen Anne Stakes, and is in the Halls of Fame of both Canada and the US. Tepin, who died aged 12, is also the dam of Delacroix (Dubawi), Group-placed in Ireland, where he won a maiden at the Curragh and was second in the Gr.2 Champions Juvenile S.

Second dam Life Happened (Stravinsky) was unraced and is a half-sister to the sire Disco Rico (Citidancer), a dual Grade 3 winner and Grade 2-placed. Besides Tepin she produced the multiple Graded winner Vyjack (Into Mischief), a multiple Grade 2 winner who was third in the Wood Memorial Stakes, then a Grade 1, and the Grade 1 Forego Stakes, and the multiple Graded-placed Prime Cut (Bernstein), a full brother to Tepin and triple winner in the US.

Third dam Round It Off (Apalachee).