As fans of “Frozen” already know from the promos for “Frozen 2,” sisters Elsa (voiced by Idina Menzel) and Anna (Kristen Bell) are going on another big adventure in the upcoming sequel ...

There is a theory that connects the events of 2010's Tangled and 2013's Frozen, which suggests Anna and Elsa are related to Rapunzel. Here is how.

Kristen Bell voices Anna and actress Idina Menzel voices Anna's sister Elsa in Disney's 2013 animated classic and its sequel, "Frozen 2," which hits theaters Friday.

When their parents’ deaths leave them orphaned, the two remain estranged, with Elsa constrained by her magic and sense of responsibility, and Anna anguished at having lost the bond with her sister.