Congratulations to Carlos Pena, Jr. and Alexa Vega! The Big Time Rush singer and the 'Spy Kids' starlet are engaged!

The pair have been dating since 2012 and are so sweet together that it may cause a toothache.

It appears Pena, 24, popped the question during a romantic road trip with his 'Machete Kills' lady love, 25. The adorable duo pretty much announced the news themselves when they posted sappy (in a cute way) photos on Instagram. In one shot of Vega wearing a huge rock, Pena wrote, "My angel!!! @vegaalexa awesome road trip so far!! Now we just need to get back…"

Meanwhile, Vega, who was married to producer Sean Covel from 2010 to 2012, captioned a shirtless photo of Pena with "Hello fiancé..."

This all went down yesterday (Sept. 11), putting a celebratory note on an otherwise somber day. Check out their super adorbs photos below.

Mazel tov, kids!

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