This certainly isn't your average backyard wedding!

Check out the aftermath of Jennifer Aniston and Justin Theroux's "backyard" wedding -- because the day after the secret nuptials -- the duo's backyard shows all the signs of having a bash of a lifetime!

Earlier today, our photogs sneaked more than a peek of the grounds of the $21M mansion in Bel Air, where the longtime duo was married yesterday afternoon.

We can spy that a large wooden deck was erected in the couple's expansive backyard and guests were able to hang out in cozy lounges. There's a a raised stage on one end and a bar on the other end of the porch. Leave it to a celeb to create a makeshift deck in just one day!

The couple purchased the home back in 2012 but did not move in until 2013 after they had totally remodeled the 8,500 square foot property. At the time, the former Friends star completely redid the grounds and ripped out an on-site vineyard to add a pool and jacuzzi. Clearly the superstar had inadvertently created the perfect spot for an intimate wedding -- which is exactly what Jen had! People is reporting that the wedding had only 74 guests, who were seated casually atop ottomans at dinner.

Celeb friends like Lisa Kudrow, Howard Stern, Sia, Chelsea Handler, Jennifer Meyer, Emily Blunt, John Krasinski, Ellen DeGeneres, Lake Bell, Scott Campbell, and Terry Richardson were also on hand for the summer soiree.