All thoroughbreds officially turned a year older on Jan. 1, but four years ago today, on Jan. 29, 2006, the filly who would become Rachel Alexandra entered the world.

Local fans wishing to celebrate the filly's birthday - and recent crowning as Horse of the Year - can do so while supporting a good cause this Sunday, as ThoroFan, with support from Anthony Brindisi, has organized a birthday party that's also a fundraiser for Old Friends at Cabin Creek.

The party will be held at the Union Grille at the Saratoga Hilton from 12 to 5 p.m.; there will be food (reservations are required), artist Frankie Flores will be on hand to create a portrait of the filly and vendors will sell merchandise. The highlight of the event? At about 3 p.m., those in attendance will call trainer Steve Asmussen's barn at the Fair Grounds to sing "Happy Birthday" to Rachel.

Fifty percent of the tab will go to Cabin Creek and will be used to build run-in sheds for the horses.

For more information or for reservations, contact the Union Grille at 682-2600 or ThoroFan's Bambii Rae at 695-3605.