Who's The Baby Daddy: Jimmy Kimmel or Matt Damon?

Jimmy and his wife Molly have a baby on the way. They don’t know the baby’s gender, they would like that to be a surprise. When they recently went to the doctor’s office, they did get a surprise. It was a bad one.
Jimmy Kimmel Meets the Man Who Spent $100k on a Cheeto
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About Jimmy Kimmel Live:
Jimmy Kimmel serves as host and executive producer of Emmy-winning "Jimmy Kimmel Live," ABC's late-night talk show.

"Jimmy Kimmel Live" is well known for its huge viral video successes with 2.5 billion views on YouTube alone.
Some of Kimmel's most popular comedy bits include - Mean Tweets, Lie Witness News, Jimmy's Twerk Fail Prank, Unnecessary Censorship, YouTube Challenge, The Baby Bachelor, Movie: The Movie, Handsome Men's Club, Jimmy Kimmel Lie Detective and music videos like "I (Wanna) Channing All Over Your Tatum" and a Blurred Lines parody with Robin Thicke, Pharrell, Jimmy and his security guard Guillermo.
Now in its fifteenth season, Kimmel's guests have included: Johnny Depp, Meryl Streep, Tom Cruise, Halle Berry, Harrison Ford, Jennifer Aniston, Will Ferrell, Katy Perry, Tom Hanks, Scarlett Johansson, Channing Tatum, George Clooney, Larry David, Charlize Theron, Mark Wahlberg, Kobe Bryant, Steve Carell, Hugh Jackman, Kristen Wiig, Jeff Bridges, Jennifer Garner, Ryan Gosling, Bryan Cranston, Jamie Foxx, Amy Poehler, Ben Affleck, Robert Downey Jr., Jake Gyllenhaal, Oprah, and unfortunately Matt Damon.
Who's The Baby Daddy: Jimmy Kimmel or Matt Damon?