Toni Collette has the reins well in hand in âDream Horseâ By Ty Burr Globe Staff,Updated May 19, 2021, 2:00 p.m. Email to a Friend Toni Collette and Dream Alliance in "Dream Horse."Kerry Brown / Bleecker Street/Associated Press For proof of how a gifted performer can lift a middling property to the next level, look no further than âDream Horse,â a British racing drama arriving in theaters this week and on VOD June 11. The movie also makes a case for casting against type. In what may be the dowdiest, most plainspoken role of a mercurial career, Toni Collette plays Jan Vokes, a small-town Welsh grocery clerk who corralled 22 of her fellow villagers into buying a brood mare and raising a prize-winning racehorse. The film is based on a true story, and itâs awfully mild, but Collette gives it a humble yet passionate intensity that makes it stick to the ribs.