Reese and Jim: The 'Legally Blonde' star finally gets her happy Hollywood ending

July 4 was a family affair for the pair, who attended a holiday party in Malibu with Ava and Deacon.

And the occasion seemed to signal the growing commitment between the two.

"Reese can't stop gushing about how special Jim makes her feel and how great it is to have him around her kids," a source said