The opening Thursday practice session for the 2012 Monaco Grand Prix would see Williams F1 drivers Pastor Maldonado and Bruno Senna finish in fifth and seventeenth respectively. Both drivers would come out early to complete their installation laps but Pastor would not return to the track for his first run until well after the first thirty minutes. His first run would see him fifth with a 1m:22.578, to be just ahead of Bruno. Pastor would improve with a 1m:19.692 to return to fifth.

As the session progressed Pastor would hover around fifth with his best time, after the first hour of the session was completed, was a 1m:17.228. Bruno had a moment that would see him straight line the chicane after leaving his braking too late. Pastor would improve to be third with a lap time of 1m:16.904. Bruno's lap time at this point was a 1m:18.617 seeing him seventeenth. Fastest at this point was Grosjean with a 1m:16.630. Hamilton was second and Pastor third. Massa and Alonso were fourth and fifth.

As the session drew to a close Pastor would improve his lap time with a 1m:16.760 but he would drop to fifth. Bruno would also find some time with a 1m:18.617 but would remain in seventeenth. Alonso would set the quickest time of the session with a 1m:16.265 from Grosjean, Perez, Hamilton, and Pastor. A good start to the weekend for Pastor but Bruno was well off the pace.

Pos  Driver         	   Team		   	 Time       Laps
 1.  Fernando Alonso       Ferrari               1m16.265s  22
 2.  Romain Grosjean       Lotus-Renault         1m16.630s  17
 3.  Sergio Perez          Sauber-Ferrari        1m16.711s  19
 4.  Lewis Hamilton        McLaren-Mercedes      1m16.747s  12
 5.  Pastor Maldonado      Williams-Renault      1m16.760s  20
 6.  Felipe Massa          Ferrari               1m16.843s  19
 7.  Kamui Kobayashi       Sauber-Ferrari        1m17.038s  21
 8.  Jenson Button         McLaren-Mercedes      1m17.190s  13
 9.  Sebastian Vettel      Red Bull-Renault      1m17.222s  14
10.  Nico Rosberg          Mercedes              1m17.261s  18
11.  Michael Schumacher    Mercedes              1m17.413s  14
12.  Nico Hulkenberg       Force India-Mercedes  1m17.631s  18
13.  Mark Webber           Red Bull-Renault      1m18.106s  14
14.  Jean-Eric Vergne      Toro Rosso-Ferrari    1m18.209s  25
15.  Daniel Ricciardo      Toro Rosso-Ferrari    1m18.252s  28
16.  Paul di Resta         Force India-Mercedes  1m18.302s  16
17.  Bruno Senna           Williams-Renault      1m18.617s  20
18.  Heikki Kovalainen     Caterham-Renault      1m19.03$s  20
19.  Vitaly Petrov         Caterham-Renault      1m19.341s  16
20.  Narain Karthikeyan    HRT-Cosworth          1m20.838s  26
21.  Charles Pic           Marussia-Cosworth     1m20.895s  18
22.  Timo Glock            Marussia-Cosworth     1m21.638s  9
23.  Pedro de la Rosa      HRT-Cosworth          1m22.423s  15
24.  Kimi Raikkonen        Lotus-Renault                    1