From Wikipedia: "SixDegrees of Kevin Bacon or "Bacon's Law" is a parlour game based on the "six degrees of separation" concept, which posits that any two people on Earth are six or fewer acquaintance links apart. Movie buffs challenge each other to find the shortest path between an arbitrary actor and prolific actor Kevin Bacon."

The game:
I will post a celeb's name, and the first person will tell me how many aquaintances ("Bacon numbers") apart they are from Kevin Bacon.

Example: 
Player: Kevin Spacey

Next Player: 2
[celeb name]

Helpful Tool: https://oracleofbacon.org

I will start with Ewan McGregor

2.
John Oliver

2. 

Bruce Willis

2.

John Oliver

2. (is there ever more than 2...? hahaha)

Channing Tatum

2

Janet Gaynor

3.

Jared Keeso

2.

Channing Tatum.

2

Walt Disney

3.

Garth Brooks

2.

James McAvoy

2.  Chris Hemsworth

1.

RDJ

2.

Melissa McCarthy

You're supposed to figure out the one from before, and then post a new celeb, City. :P

So 2

Reese Witherspoon