• "Grey's Anatomy" Season 13 will air this fall on ABC.

"Grey's Anatomy" Season 13 will air this fall on ABC. (Photo : ABC)

"Grey's Anatomy" season 13 will premiere this coming September, but fans of the hit ABC series can no longer wait to find out what's in store for their favorite characters.

Here are five things we already known from "Grey's Anatomy" season 13.

Meredith vs. Maggie

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Meredith Grey (Ellen Pompeo) and Maggie (Kelly McCreary) will have a huge feud in the upcoming episodes of the hit ABC series especially after the latter finds out that the former hooked up with the man she likes.

Meredith and Nathan Riggs (Martin Henderson) hooked up a few times before the former was told by Maggie herself that she likes Nathan.

Amelia, Owen talk about having babies

Amelia Shepherd (Caterina Scorsone) and Owen Hunt (Kevin McKidd) just tied the knot in season 12. There are rumors that the couple will talk about having babies in the near future.

However, it's also possible that they decide to wait for a while because both Amelia and Owen lost their baby with their previous partners.

Jo, Alex's relationship woes continue

Jo Wilson (Camilla Luddington) will finally tell Alex Karev (Justin Chambers) the real reason why she just can't accept his proposal.

In the finale, Jo told Andrew DeLuca (Giacomo Gianniotti) that she was previously married to a man who physically assaulted her. However, this is something that she kept from Alex for a very long time.

Arizona, April patch things up

Arizona Robbins (Jessica Capshaw) and April Kepner (Sarah Drew) will decide to patch things up in the upcoming episodes.

The best friends had a brief falling out after Arizona told Jackson Avery (Jesse Williams) that his ex-wife is pregnant with their child.

April, Jackson may get back together

April and Jackson may consider getting back together especially now that they have a child.

The couple decided to finalize their divorce in season 12. At that time, April already knew that she was pregnant, but she purposely kept it a secret from Jackson.

In the finale, April gave birth and Jackson was there to give her support.

"Grey's Anatomy" season 13 will premiere on ABC on Sept. 22 at 8 p.m. ET.