According TMZ's pictured report, the "Proposal" co-stars took to the rugged terrain together while the 34-year-old "Change-Up" hunk toted little Louis in a backpack carrier.
While the two are said to be vacationing with pals at nearby Jackson Hole (where Sandra's family has a home), sources say the pair are nothing more than friends, as they explained, "They've been buddies for over 10 years now."
Another insider added, "They are like family, like a brother and sister. It's not a love affair. They've been friends for over 10 years, and they care for each other deeply. They support each other and have a lot of fun together."
