In September of 2017 we have reported about GitHub page from LedgerHQ called blue-app-monero, according to which on Monday, September 4, the process of integration of Monero in Ledger and Blue Ledger Nano S has begun. Now we can certainly say that Monero will be supported in Ledger hardware wallet, as that was confirmed by Riccardo Spagni, a member of Monero Core Team.
...We have to do a bunch of work for it and it becomes painful. We've seen it with Ledger. It has taken a year to get Monero support on Ledger and that's only really coming together now. And it is because of the amount of work and effort that is needed to go into doing that.
Riccardo Spagni was talking about Monero and privacy on Doug Polk Podcast on April 9, 2018. The member of Monero Core Team said that Monero is already on Ledger, and there are some commits being performed to fix a couple of small issues. He stated that the official Ledger support will go live alongside the Monero 0.12.1 release. Moreover, Riccardo Spagni said some words about Trezor support, stating that Trezor team is currently working on it.
I think that Ledger has kind of blazed the way, there is a lot of stuff that Trezor can suck in from that.
What is more, he stated that there is a group in Monero community that is also building a hardware wallet which is based on the Trezor's schematics. We believe that it is great news for Monero community as the privacy coin will be finally officially supported on hardware wallet Ledger.