"Shrek Forever After"

"Shrek Forever After"  -- the fourth film in the rolling-in-the-green billion-dollar franchise -- opened Friday with a $20-million domestic-debut day, according to some early estimates. Variety pegs the first-day total at $20.7-million.

The first Shrek film in 3-D, which opened in 4,359 theaters, may debut a little less green than the saga's second and third films. Early estimates are for a $70-million to $80-million total weekend for "Shrek," though animated sequels have proved notoriously challenging to predict. DreamWorks was dampening box-office expectations for the fourth Shrek.

The first Shrek film debuted at $42-million, the second film at $108-million and "Shrek the Third" opened at more than $121-million -- relatively far, far away the record for animated films.

"Iron Man 2" made nearly $8-million Friday, according to early estimates, continuing its strong performance.

This report will update this weekend as the box-office figures come in.