Oh, what a lovely year it's been for those of us who thrive on '90s nostalgia and adorable Instas. We know the year is only half over, but we think it's safe to dub 2015 the year of reunions -- both onscreen and off.

Not only have some of our favorite TV and movie casts reunite over the last six months, but they also captured everything on social media. [Insert praise emoji here.] So, if you want to get your heart racing on nostalgia fuel, check out the 13 cast reunions that had us up outta our seats and screaming "YAASSS" at the top of our lungs:

"Ugly Betty"

The cast of the quirky network comedy "Ugly Betty" reunited for America Ferrera's birthday party in April. A beaming Ferrera, who turned 31, was surrounded by her TV familia, Vanessa Williams, Tony Plana, Judith Light, Mark Indelicato and costume designer Patricia Field.

"Scrubs"

This calls for a celebratory EEAAAGLE! Zach Braff and Donald Faison are already the ultimate celeb BFFs, but seeing them reunite with former costar Christa Miller really made our hearts swell.

"Twilight"

We know it hasn't been very long since Edward and Bella lived happily ever after, but that doesn't mean we don't lose our sh-t when Cullens reunite IRL. Ashley Greene reunited with fellow onscreen vamp Kellan Lutz at a L.A. Lakers game at Staples Center in April, and our hearts couldn't take the cuteness. "Reunited with Kel at the Lakers game #lovethisone," she captioned the sweet pic. Ermahgerd.

"One Tree Hill"

The River Court gang's all here! Lucas (Chad Michael Murray), Peyton (Hilarie Burton), Mouth (Lee Norris) and Skills (Antwon Tanner) reunited with their "Tree Hill" family in Wilmington, North Carolina in March. This is a huge deal for Leyton fans, seeing as Lucas and Peyton never properly said goodbye to the show in its final season. "Let's do this again y'all!!" Tyler Hilton, a.k.a. Chris Keller, wrote on Insta. "Best fans of all time. Best friends I could ask for. Been through a lot together! #OTHfam." See, Peyton? People don't always leave; sometimes they come back, too.

"Greek"

We reserve this emotional response for special occasions, but... YAASSS. Cast members from the ABC Family's amazing frat dramedy "Greek" reunited to celebrate Scott Michael Foster's 30th birthday, and of course, they partied the night away. We love you, bbs.

"Buffy The Vampire Slayer"

In case you were wondering, Willow and Buffy are still BFFs. The former costars not only hang out on the reg, but their children are also friends! "So this girl (#AlysonHannigan) and her husband (#AlexisDenisof) know how to throw a party," Sarah Michelle Gellar posted to Instagram. "I thought I was good with the crafts, till I went to this party #CraftMaster Thanks for having the #PrinzeFamily I've never seen a farm and pony rides in Santa Monica before #NowIveSeenItAll." SMG also had lunch with Danny Strong (aka Jonathan) in May. "I'm so proud of him," she wrote. "I knew you when, Danny."

"iCarly"

Is squealing the only appropriate emotional response to this? Miranda Cosgrove reunited with her "iCarly" costars three years after the beloved Nickelodeon show left the air. "Got to see these guys tonight :)," she posted on Instagram in February. Standing next to her, all smiles, were Jennette McCurdy (Sam), Nathan Cress (Freddie) and Jerry Trainor (Spencer).

"Harry Potter"

Draco Malfoy posted this magical (sorry) pic of him hanging out with the Weasley squad, James Phelps, Bonnie Wright and Rupert Grint. Tbh, it was nice to see Malfoy and the Weasleys -- once mortal enemies in the wizarding world -- living in harmony after all these years.

"Cruel Intentions"

Reese Witherspoon, Selma Blair and Sarah Michelle Gellar had a girls night out at The Rockwell in Los Angeles last month, where they sang their hearts out to -- wait for it! -- "Cruel Intentions: The Musical." SMG and Blair even recreated their infamous kiss from the '90s teen flick and oh my god it was just as magical now as it was 16 years ago.

"Suite Life of Zack And Cody"

Ashley Tisdale had the suite-est reunion of them all when she reunited with her "Suite Life of Zack and Cody" costars last month. "I love seeing these boys," she wrote of twins Dylan and Cole Sprouse. "My little brothers have grown into such smart, talented, and genuinely great people." Aww!

"Lizzie McGuire"

Miranda and Lizzie, together again! In April, former "Lizzie McGuire" star Jake Thomas posted this amazing snap of him reuniting with his former Disney Channel costars, Hilary Duff and Lalaine, on Insta. The trio -- sans Gordo, SIGH -- looked happy to be back together after more than a decade apart. Next time, guys, just make sure to give Gordo a call. We know he hates bowling and all, but nobody likes to feel left out!

"Gilmore Girls"

MTV News was lucky enough to be in the audience when all of our favorite Stars Hollow residents reunited at the 2015 ATX Television Festival last month -- and it was the most magical moment of our entire lives. (Even more magical than SNOW.) When asked where each character would be today, Lauren Graham said she thinks Luke and Lorelai are "still together, 100 percent." As for Rory? Well, she still can't decide between her ex-boos. Alexis Bledel, to her credit, is playing it like Switzerland, even eight years later. "They’re going to hate me," she said.

"Full House" "Fuller House"

When John Stamos announced "Fuller House," a wave of nostalgia hit '90s kids like a tsunami of emotion. The Netflix revival will reunite nearly the entire cast (sadly, Mary-Kate and Ashley Olsen passed on a cameo) from the classic family sitcom. With filming set to start in July, we seriously CAN NOT wait to see these humans back on our TV screens together again.