Context :

Aims : WISE provides an infrared all-sky survey which aims at completing our knowledge on the possibly dramatically increasing number of brown dwarfs with lower temperatures .
We search for the nearest representatives of the coolest brown dwarfs , which will be very interesting for detailed follow-up observations , once they haven been discovered .

Methods : We have used the preliminary data release from WISE , selected bright candidates with colours typical of late-T dwarfs , tried to match them with faint 2MASS and SDSS objects , to determine their proper motions , and to follow-up them spectroscopically .

Results : We have identified two new ultracool brown dwarfs , WISE J0254 + 0223 and WISE J1741 + 2553 , with large proper motions of about 2.5 and 1.5 arcsec/yr , respectively .
With their w 1 - w 2 \sim 3.0 and J - w 2 \sim 4.0 colour indices we expect both to have a spectral type of \sim T8-T10 and absolute magnitude of M _ { w 2 } \sim 14 .
We confirm WISE J1741 + 2553 as a T9-T10 dwarf from near-infrared spectroscopy with LBT/LUCIFER1 .
From their bright WISE w 2 magnitudes of 12.7 and 12.3 , we estimate distances of 5.5 ^ { +2.3 } _ { -1.6 } pc and 4.6 ^ { +1.2 } _ { -1.0 } pc and tangential velocities of \sim 65 km/s and \sim 34 km/s indicating Galactic thick and thin disk membership , respectively .

Conclusions :