Hollywood heavy Tom Cruise looked like just another member of The Firm the other night when he turned up at attorney Earle Cooley’s jam-packed memorial service at the John Joseph Moakley Courthouse .

The “Knight & Day” leading man, wearing a dark suit and his trademark Tinseltown smile, joined rarely seen Church of Scientology leader David Miscavige at the service for Cooley, who was the religious group’s legal Top Gun for more than 25 years. Talk about Risky Business . . .