Ready or not, Twitter's new profiles are coming.

Announced early last month, the profile update will soon be required for everyone on the service. Beginning May 28, all Twitter users will have the new profile, which has already been rolled out to new users and some existing users in the past month.

New http://t.co/JbzACuw5a2 profiles will be turned on for everyone May 28. Get ahead of the curve & update yours: http://t.co/GpCan7yXGw — Twitter (@twitter) May 6, 2014

It's unclear how many people currently have the new profile, which features larger profile and header images, new timeline views and the ability to pin a tweet to the top of a profile page. Twitter did not immediately respond to Mashable's request for comment, but based on Twitter reaction to the design change, it appears that a number of users are still using the old layout (and aren't happy about the impending switch).

.@twitter It looks a bit @facebook-ish if I'm being honest. :-/ — Daniel Wallen (@TheWallenWay) May 6, 2014

PLEASE NO, I BEG YOU, @twitter. IT IS BEYOND AWFUL. DON'T FORCE US TO CHANGE THE PROFILE. WE HATE FB. — ValeriA (@ValAbnormal) May 6, 2014

@twitter arggghhhh….. nooooo!! Can I switch back? — Evan Davis (@EvanD) May 6, 2014

The largest point of contention appears to be the new profile's resemblance to another popular social network: Facebook. Many users don't like the Facebook look, or prefer that Twitter distinguish between the two services more clearly. Both profiles include a larger, square profile picture, a cover image that spans the length of the feed, and the ability to Like or follow a user above the stream of content.

Here's how the two profiles look side by side: