With this momentum, Indiana Jones and the Kingdom of the Crystal Skull is expected to be the second biggest Memorial Day movie opening, according to studio estimates.

Here’s how it breaks down: Indiana Jones and the Kingdom of the Crystal Skull grossed $101 million from Friday to Sunday, with an additional $25 million from its Thursday opening. It’s expected to pull in an additional $25 million on Monday.

So, who’s the top box office champ? Pirates of the Caribbean: At World’s End snagged $139.8 million for its Friday through Monday Memorial Day weekend opening; $153 million with the Thursday prior included.

Runners-up at the 2008 Memorial Day weekend box office include “The Chronicles of Narnia: Prince Caspian” and “Iron Man.”

Prince Caspian is the third book in C.S. Lewis’ classic Chronicles of Narnia novels. It is, however, the second movie in the series, reportedly due to some problems with the CGI work in the original second film. It’s set several hundred years later, at least on the Narnia side.

Starring Tilda Swinton, Liam Neeson, Ben Barnes, Warwick Davis, William Moseley, Georgie Henley, Anna Popplewell, Peter Dinklage, Eddie Izzard. Opens May 16th.