She reversed the form to beat Magical in the Moyglare Stud Stakes and then defeated male opposition to take the Prix Jean-Luc Lagardère.

His other progeny include Cape Blanco, Frankel, Golden Lilac, Nathaniel, New Approach, Rip Van Winkle and Ruler of the World.

[4] Happily is her fifth foal, the first four being Marvellous, Gleneagles, Coolmore (C L Weld Park Stakes) and The Taj Mahal (Zipping Classic).

Ridden by her trainer's son Donnacha O'Brien she made little impact and came home seventh of the eleven runners, ten lengths behind her winning stablemate September.

Three weeks later, with O'Brien again in the saddle, the filly started odds-on favourite for a similar event at the Curragh and recorded her first success as she took the lead inside the final furlong to win by one and three quarter lengths from the Ger Lyons-trained Shalailah.

"[7] On 20 August at the Curragh Happily faced a rematch with September in the Group 2 Debutante Stakes, with the latter being marginally preferred in the betting.

[9] At Chantilly Racecourse on 1 October, Happily was matched against male opposition in the Group 1 Prix Jean-Luc Lagardère over 1600 metres.

Ridden by Moore she went off the 6/5 favourite ahead of five rivals including Masar (Solario Stakes), Olmedo (runner-up in the Prix des Chênes) and the Listed race winners Mythical Magic and Francesco Bere.

[11] On her final appearance of the season Happily was sent to California to contest the Breeders' Cup Juvenile Fillies Turf at Del Mar Racetrack on 3 November.

Racing on much firmer ground than she had previously encountered she started favourite but dropped out of contention after failing to obtain a clear run in the last quarter mile and finished last of the sixteen runners.

Happily took on male opposition and older horses in the Eclipse Stakes at Sandown Park in July and came home fifth of the seven runners behind Roaring Lion.

Two weeks later the filly was entered in the Queen Elizabeth II Stakes at Ascot but was withdrawn from the contest after becoming distressed and unruly in the starting stalls.