She told Seth Meyers all about it on Late Night!

Witherspoon said working with Winfrey was...well, magical:

It's amazing, I can't actually believe they paid me American dollars to sit next to her," she admitted. "I was scared too, because sometimes you meet your heroes and they're not as awesome as you want them to be?

She's better than I imagined.

And this isn't the first time she's hyped Oprah's hang skills! Apparently margaritas get involved...

Of course, drinks wouldn't be permitted when the group took a road-trip to Disneyland!

Reese Witherspoon seems to have all the luck with the mega-stars lately.

It's not just Oprah Reese has been rubbing elbows with. For season 2 of HBO's Big Little Lies, Meryl Streep will be making an appearance!

Reese told Uproxx what it was like finding out she'd be working with Meryl:

Well, she sent an email to Nicole [Kidman] and I, and it said, 'Okay I love the part and I'm gonna do it,' and I like, dropped the phone. Like mic dropped? I phone dropped. And I called Nicole and I was like, 'Is this real life? Like, is this really happening?

And then I got off the phone with Nicole and I like, hugged myself gently for a moment, and said, 'This is really happening, you're working with Meryl Streep. And then I called the writer and I go, 'You better write me good scenes with Meryl Streep.'

If Witherspoon's Instagram is any indication, everyone seems to be having a great time!

On Stephen Colbert's show, Oprah did raise one qualm she had with Reese: she's a gum-chewer. Oprah then explained her aversion to gum.

I intensely dislike it. It comes from childhood. I grew up poor in Mississippi and my grandmother – absolutely no hyperbole whatsoever – my grandmother used to try to save gum, so she would put it on the bedpost, she would put it on the cabinet.

As a child, I used to bump into it and it would rub up against me and you know what it's like when you've taken it out of your mouth and it's been out a couple of weeks? It's bad. I was afraid of it.

When I go out to the world, I can't bar it. I have no powers there. It's a thing. I can't stand it.

Thankfully, the gum chewing caused no lasting damage to Reese and Oprah's friendship!

She said 'oh, that's too bad' and then she just walks off. Ask her about it.

H/T - Uproxx, Uproxx, Daily Edge