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Caitlyn Jenner wasn't lying when she talked about the "tremendous amount of support" she's received!

During tonight's premiere of I Am Cait, fans got to see how Caitlyn's family reacted on the day her big Vanity Fair cover came out. In the candid clip, the 65-year-old is watching TV news coverage of the history making cover image.

"Khloe Kardashian tweeted this morning, ‘We were given this life because we were strong enough to live it! I couldn't be prouder!!! Caitlyn, you are beautiful," a news anchor says as Caitlyn flashes a smile.

Caitlyn even gets a rare phone call from Rob Kardashian. "Your cover looks amazing," Rob tells a beaming Caitlyn.

I am Cait

"Isn't that rockin'?" Caitlyn asks. "You look amazing, everything," Rob gushes. "It's so good to hear form you," Cait tells him.

Kim Kardashian is the next family member to place a congratulatory call to Cait. "You didn't tell me you were on Twitter!" are Kim's first words to Caitlyn (LOL).

"I've been on Twitter for an hour," Cait smiles.

"Well, the head of Twitter just said we think Caitlyn could break President Obama's gained follower record, 1 million within the first five hours," Kim tells Cait.

"Let's go for the record! I love records!" the former Olympian laughs.

Kim adds, "Just wanted you to know I'm on the bandwagon. All eyes on you now. You cannot disappoint."

Tune in to I Am Cait Sundays at 8 p.m., only on E!