2.
When John Krasinski had a truly pure interaction with Richard E. Grant:
4.
When Henry Winkler had a sweet response to this tweet from his Happy Days costar, Ron Howard:
5.
When Amber Tamblyn's father, actor Russ Tamblyn, called her out:
6.
When Zendaya shared the sweetest moment with Viola Davis and her daughter, Genesis:
7.
When Mark Hamill and Julia Louis-Dreyfus reunited:
8.
When Shawn Mendes and Halsey shared the love:
9.
When Cole Sprouse corrected Justin Bieber's grammar in this perplexing tweet:
10.
When Kristen Bell replied to this Stephen Colbert tweet, admitting defeat:
11.
When Taylor Swift fangirled over Cher:
12.
When Gordon Ramsay seemed like the perfect fit for Lil Nas X's "Panini":
13.
When Alex Rodriguez apologized for saying Kylie Jenner talked about how rich she was at the Met Gala:
14.
When Zooey Deschanel celebrated the 10-year anniversary of (500) Days Of Summer with Joseph Gordon-Levitt:
15.
When Megan Thee Stallion and Jada Pinkett Smith shared a hot girl moment:
16.
When Mariah Carey starred in Sam Smith's dreams:
18.
When Alyson Stoner had the sweetest moment with Missy Elliott after they danced together at the VMAs:
19.
When Halsey confirmed this truth about Taylor Swift's song, "Miss Americana & The Heartbreak Prince":
21.
When Steve Carell was so excited for Jenna Fischer and Angela Kinsey's Office podcast…but needed some translation help:
22.
When Joe and Kevin Jonas shared reasons why Nick is the best on his birthday:
23.
When Kristen Bell and Ted Danson proved Twitter can really be the Good Place sometimes:
24.
When Missy Elliott was into this collab idea from Lizzo:
26.
When Kelsea Ballerini stanned Halsey:
27.
When Chris Evans was just as excited for John Krasinski's A Quiet Place sequel as the rest of the world:
28.
When Friday Night Lights star Adrianne Palicki questioned this quote from Ted Danson on The Good Place:
29.
When Maya Rudolph used her first (and likely only) tweet of 2019 to reply to Kamala Harris's reaction to her SNL impression:
30.
When Robert Irwin wrote the sweetest message to his sister, bride-to-be Bindi Irwin:
31.
When Beanie Feldstein and Ben Platt had an emotional moment:
32.
When Taylor Swift and Lizzo united their fanbases:
34.
When Lili Reinhart gave some vegetable advice to her Riverdale costar Shannon Purser:
35.
When Ariana Grande and Lizzo were feelin' good as hell after they collaborated on a "Good As Hell" remix:
36.
When Reese Witherspoon loved and appreciated Kim Kardashian's Elle Woods Halloween costume:
37.
When Pete Wentz was honored that Taylor Swift was inspired by him:
38.
When Ellen Pompeo had a super McCute McExchange with her former Grey's Anatomy costar, Eric Dane (aka McSteamy):
39.
When Reese Witherspoon celebrated Zendaya and it was a mutual love fest:
40.
When Emmy Rossum had the answers for Lili Reinhart:
41.
When Lizzo got Mariah Carey's stamp of approval but didn't even need it:
42.
When Pink and Lucy Hale hung out and became friends…
43.
…and when Kacey Musgraves and Lil Nas X did too:
45.
When Blink-182's Mark Hoppus had a hilarious reply to this Kevin Jonas tweet:
46.
When Janelle Monáe loved how much Lizzo loved Disneyland:
47.
And when Lili Reinhart and Chrissy Teigen bonded over Luigi's Mansion 3:
It's the end of 2019, and we're looking back on the year. Check out even more Best of 2019 content here!