Jennifer Aniston  and her husband-to-be Justin Theroux got engaged in August 2012 after meeting on the set of Wanderlust two years earlier. While prepping for their big day, the couple has shared tons of sweet moments, from red carpet cuteness to steamy beach PDA. In honor of Jennifer's 45th birthday today, we're taking a look back at her most adorable moments with Justin — keep reading to see them all now.
Getty , Fame Flynet , Universal Pictures [Array], Terry's Diary 
Justin was by Jennifer's side as she promoted Life of Crime at the Toronto Film Festival in September 2013.
Jennifer and Justin lounged on a boat during their vacation in Capri, Italy in June 2012.
Jennifer and Justin were beaming while out running errands around NYC in September 2011.
They tanned their toned bodies together in Cabo in January 2013.
Jen and Justin were the picture of perfect love on the Oscars red carpet in February 2013.
Jennifer and Justin took a picturesque stroll through NYC in September 2011.
They posed arm in arm at the LACMA's Art and Film Gala in October 2012.
The couple held hands as they arrived at NYC's Rockefeller Plaza in September 2011.
Jen wore a bikini next to a shirtless  Justin while in Cabo at the end of 2012.
Justin planted a smooch on Jen during her Walk of Fame ceremony in LA in February 2012.
The couple held hands during a day of shopping in NYC in May 2013.
Jennifer showed off her engagement ring during an October 2012 trip to Santa Fe, NM.
In September 2011, Justin put a loving arm around Jennifer during one of their many walks around NYC.
Jennifer and Justin shared a look of love in Paris in June 2012.
The cute couple toured the Vatican Museums in June 2012.
Jennifer and Justin layered up for a loved-up walk through NYC in September 2011.
The happy couple posed for photos at Elle's 18th Annual Women in Hollywood Tribute in October 2011.
Jennifer and Justin left the Shoreditch House in London while she was overseas promoting Horrible Bosses in July 2011.
They hung out with Drew Barrymore  and husband Will Kopelman in October at a LACMA 2012 Art + Film Gala in LA.
Jennifer was a nominee for her work on the Lifetime movie Five at the January 2012 Directors Guild Awards in LA. Justin was right by her side the entire night and the pair even snuggled up and happily posed for a few photos.
They snuck in some PDA during their December 2012 stint in Cabo.
Jennifer and Justin took a September 2011 stroll through the West Village.
They held hands in January 2012 after leaving a movie theater in LA.
In November 2012, Jennifer and Justin had a laugh on the red carpet together at the American Cinematheque Awards in LA.
Justin was full of laughs during Jen's July 2011 Hand and Footprint ceremony in LA.
Jennifer and Justin posed for photographer Terry Richardson following a NYC dinner date in June 2011.
Photo courtesy Terry's Diary 
Jennifer and Justin held hands and wore matching aviator sunglasses at the airport after attending Jen's London premiere of Horrible Bosses in July 2011.
They cuddled up for a romantic walk through NYC in September 2011.
Jennifer and Justin chatted with Reese Witherspoon  at Elle's 18th Annual Women in Hollywood Tribute in October 2011.
They arrived at NYC's Museum of Modern Art in November 2011 holding hands.
Justin held an umbrella over the couple as they ventured out during a rainy NYC day in September 2011.
The couple left their NYC building in October 2011 wearing matching hats.