After meeting on the set of 'Mr. and Mrs. Smith' in 2004, speculation about their relationship began to grow, and it's no wonder. These two absolutely sizzled on-screen together. You know, when they weren't attempting to kill each other.
In 2004, the duo posed suspiciously far apart at a press event, raising many eyebrows as to why they were so clearly trying to stay away from each other. This is one of those times where a picture really does speak a thousand words...and then some.
W magazine published photos of the still unconfirmed couple and five children in a story about domestic bliss in July 2005. This was only a few months after Jennifer Aniston filed for a divorce from Pitt, making many people deem the magazine shoot inappropriate. Little did we know it was also an image of the family they would one day become.
Working in her capacity as a UNHCR Goodwill Ambassador, Angelina Jolie took Brad Pitt to visit those affected by the 2005 Kashmir earthquake. Of course, this was just the beginning of their overwhelming support to humanitarian causes. They really do make a great team together.
Nothing brings a couple closer together like starting a family. Pitt officially adopted Maddox and Zahara in January 2006, and Jolie gave birth to their daughter Shiloh in May of that very same year. The actor practically became a father of three overnight. We should have known right then and there that this relationship was for keeps.
It took a while for these two to openly express their affection for one another in a public setting, but they eventually let their undeniable feelings for each other shine through and finally started showing off some PDA on the red carpet. And the rest, as they say, is history.
As we've discovered throughout their years together, these two love having a big family. At the 2008 Cannes Film Festival, Jolie flaunted her growing baby bump and gave birth to twins Knox and Vivienne in July of that same year.
As their family grew, so did their commitment to each other. In March 2007, Jolie filed a request to legally change her son's surname from Jolie to Jolie-Pitt, which was approved on May 31 of that year. Now all six of their children go by their combined last name.
It would seem strange to talk about pivotal milestones in their relationship without referring to Angelina Jolie's leg-out pose at the Oscars in 2012. In fact, her leg became so talked about that it even earned its own Twitter account. You can't deny these two know how to make an impression.
And now with an engagement ring securely on her finger, the world can now rest easy that a wedding will inevitably be in this couple's future, despite their former protests. But after everything they've accomplished and been through together, this moment has been a long time coming.