Liguori left The Lion’s board after becoming the CEO of Tribune Co. earlier this year.
MGM topper Gary Barber made the announcement during a call with investors on Wednesday.
Tellem, former president of CBS Entertainment, joined Microsoft last year as president of entertainment and digital media to oversee creation of a new studio charged with creating interactive content for the Xbox 360.
MGM Holdings also reported Wednesday that second quarter revenues had increased by nearly three times over the 2012 quarter to $339 million, compared with $128.4 million, thanks to the James Bond title “Skyfall” and “The Hobbit: An Unexpected Journey.”
The privately-held studio reported second-quarter earnings of $36 million, down from $42.1 million in the year-ago quarter, which included a one-time gain from an asset sale. Without that gain, earnings were up $30 million for the quarter.