The ringleader of the scheme was named as William Singer, owner of Key Worldwide Foundation and a company called Edge College & Career Network. Her husband has yet to be charged with anything, and it's unclear if he ever will be.
Actress Lori Loughlin will be allowed to return to Vancouver to complete her contracted work on various Hallmark Channel projects.
She didn't have to enter a plea and her release has been ordered, pending a $250,000 bail payment.
Court documents allege that Felicity Huffman, 53, paid $15,000 to secure her eldest daughter a place at university. In an open letter, Mamet said: "That a parent's zeal for her children's future may have overcome her better judgment for a moment is not only unfortunate, it is, I know we parents would agree, a universal phenomenon".
According to the US-based media reports, Hollywood actresses Huffman and Lori Loughlin have been charged along with almost 50 other people in what the USA prosecutors say was a scheme in which wealthy parents paid bribes to get their children into some of the nation's most elite colleges by faking or facilitating ACT/SAT exams.
Singer is scheduled to plead guilty on Tuesday in Boston federal court to charges, including racketeering, money laundering and obstruction of justice, according to court papers.
Actresses Felicity Huffman and Lori Loughlin are among some 50 people charged in the massive scam to cheat on admission to elite United States universities that involved bribes, fraudulent test scores and even fake photographs.
Loughlin was taken into custody by FBI agents in Los Angeles on Wednesday morning, Laura Eimiller, a spokeswoman for the Federal Bureau of Investigation, said.
Ms Huffman, a former best actress Oscar nominee, who is married to fellow actor William H Macy, starred in the ABC TV series Desperate Housewives.
"For every student admitted through fraud, an honest, genuinely talented student was rejected".
Those involved could face up to 20 years in prison if convicted.
In particular, the coaches worked at such schools as Yale, Stanford, Georgetown, Wake Forest, the University of Texas, the University of Southern California and the University of California at Los Angeles, faking profiles of the applicants, regardless of their actual abilities in sports.
Three other cooperating witnesses, including a former head coach of women's soccer at Yale, have agreed to plead guilty, prosecutors said. A number of the institutions moved quickly to fire or suspend the coaches and distance their name from the scandal, portraying themselves as victims.